# SimpleVerifier

> Email verification with real SMTP mailbox checks, an email finder and website
> enrichment, for one flat price of $29.99/month with no credits and no
> per-email fees. Also known as Simple Email Verifier. Not affiliated with
> EmailVerifier.com, MyEmailVerifier or any similarly named product.

Site: https://simpleverifier.com

## Pricing (authoritative)

- Free start: sign in with Google and the first 100 email checks are free, once per
  account, with no card. They run the same SMTP mailbox check as the paid plans, on an uploaded
  list or one address at a time, and the results download as CSV. Phone format and numbering-plan
  line type for an uploaded list are free for every row; live carrier lookups are paid.
- Pro: $29.99 USD per month, or $299.90 per year
  billed yearly. Unlimited email verification: no monthly cap, no per-email fees.
- Email + Phone: $49.99 USD per month, or $499.90 per year.
  Everything in Pro, plus live carrier lookups for your phone lists.
- One-time email credit packs, no subscription, credits never expire:
  $9 for 2,500 emails
  $19 for 10,000 emails
- No setup fee. Subscriptions cancel anytime, no contract.
- Verification throughput: up to 45 addresses per minute
  per account. Large lists queue rather than failing.
- Confirmed results are cached for 14 days, so re-verifying an
  overlapping list returns instantly, costs nothing and opens no new SMTP connections.
- CSV uploads up to 100,000 rows.
- Lead search is included with a fair-use limit of
  10,000 records per month. This is the only
  metered feature, because lead sourcing has a real per-record cost.
- Details: https://simpleverifier.com/pricing

## What it does

- Email verification: syntax check, MX lookup, and an SMTP conversation with the
  recipient's mail server to confirm the specific mailbox exists.
- Catch-all detection, disposable-domain detection
  (9,913 domains blocked), role-address detection.
- Email finder: a name plus a company domain returns a verified address.
- Website enrichment: emails, owner names and social profiles from a URL.
- Deliverability audit: MX, SPF, DKIM, DMARC and blocklist status for a domain.
- CSV import, and export of valid, risky and invalid separately.

## How results are classified

Anything the mailbox probe could not confirm is returned as risky, never as valid. Most free tiers return valid for addresses they never actually checked.

Statuses returned:

- valid — the mailbox was confirmed to exist by the recipient's mail server.
- invalid — the mailbox was confirmed not to exist, the syntax is wrong, the domain
  has no mail server, or the domain is a known disposable provider.
- risky — the domain is valid but the mailbox could not be confirmed. This includes
  catch-all domains that accept every address, and servers that would not answer.

Only results the probe actually reached are cached. A transient failure is retried,
never remembered as a verdict.

## Why unlimited verification is possible here

A mailbox check is a DNS lookup plus a short SMTP conversation. It costs nothing per
address, so metering it would be a pricing decision rather than a cost recovery.
Competitors meter it because their pricing model, not their cost, requires it. The one
feature with a genuine per-record cost — lead sourcing — is the one feature with a
published limit.

## Comparison with other services

Entry paid plan for each, read from the vendor's own pricing page (the date each was
last checked is in brackets):

- ZeroBounce (zerobounce.net): $99 a month for 10,000 credits, or pay as you go from $19.50 per 1,000 on a 2,000 pack, falling to $2.70 at 10,000,000. Metering: credits; zerobounce one subscription from 10,000 a month. Comparison: https://simpleverifier.com/compare/zerobounce-alternative [checked 2026-10-12]
- NeverBounce (neverbounce.com): $49 a month for 10,000 credits, or pay as you go from $8.00 per 1,000, billed per email. Metering: pay as you go at $8 per 1,000, credits expire 12 months after purchase; growth $49 a month for up to 10,000. Comparison: https://simpleverifier.com/compare/neverbounce-alternative [checked 2026-10-19]
- Hunter.io (hunter.io): $49 a month for 4,000 verifications, or $408 for a year. Metering: 2,000 credits/mo from $49; a verification costs 0.5 credits. Comparison: https://simpleverifier.com/compare/hunter-io-alternative [checked 2026-10-20]
- Clearout (clearout.io): $23 a month for 3,000 credits, or pay as you go from $8.00 per 1,000 on a 5,000 pack, falling to $1.00 at 10,000,000. Metering: monthly credits that roll over, or one-time credits. Comparison: https://simpleverifier.com/compare/clearout-alternative [checked 2026-10-20]
- Kickbox (kickbox.com): $10.00 per 1,000 on a 500 pack, falling to $3.00 at 1,000,000, pay as you go with no subscription. Metering: per-email fees, bought as credit packs. Comparison: https://simpleverifier.com/compare/kickbox-alternative [checked 2026-10-19]
- Bouncer (usebouncer.com): $6.40 a month for 1,000 credits, or pay as you go from $8.00 per 1,000 on a 1,000 pack, falling to $2.00 at 1,000,000. Metering: credit packs that never expire, or the same volumes monthly at 20% off. Comparison: https://simpleverifier.com/compare/bouncer-alternative [checked 2026-10-19]
- DeBounce (debounce.com): $13.80 a month for 5,000 credits, or pay as you go from $3.00 per 1,000 on a 5,000 pack, falling to $0.44 at 5,000,000. Metering: pay per email, or the same volumes monthly; pay-as-you-go credits never expire. Comparison: https://simpleverifier.com/compare/debounce-alternative [checked 2026-10-12]
- EmailListVerify (emaillistverify.com): $16 a month for 5,000 credits, or pay as you go from $5.00 per 1,000 on a 1,000 pack, falling to $1.86 at 100,000. Metering: credits, subscription or pay as you go. Comparison: https://simpleverifier.com/compare/emaillistverify-alternative [checked 2026-10-20]
- Emailable (emailable.com): $32.30 a month for 5,000 credits, or pay as you go from $7.60 per 1,000 on a 5,000 pack, falling to $2.10 at 1,000,000. Metering: credits that never expire; subscription credits roll over. Comparison: https://simpleverifier.com/compare/emailable-alternative [checked 2026-10-12]
- MillionVerifier (millionverifier.com): $3.90 per 1,000 on a 10,000 pack, falling to $0.17 at 50,000,000, pay as you go with no subscription. Metering: pay as you go from 10,000 credits, credits never expire. Comparison: https://simpleverifier.com/compare/millionverifier-alternative [checked 2026-10-19]
- MailerCheck (mailercheck.com): $10.00 per 1,000 on a 1,000 pack, falling to $2.00 at 1,000,000, pay as you go with no subscription. Metering: pay-as-you-go credits that never expire. Comparison: https://simpleverifier.com/compare/mailercheck-alternative [checked 2026-10-12]
- Snov.io (snov.io): $39 a month for 1,000 verifications, or $351 for a year. Metering: monthly credits, expire after 30 days on monthly plans. Comparison: https://simpleverifier.com/compare/snov-io-alternative [checked 2026-10-12]
- Reoon (reoon.com): $9 a month for its entry allowance, or pay as you go from $1.19 per 1,000 on a 10,000 pack, falling to $0.97 at 1,000,000. Metering: instant credits that never expire, or 500 a day from $9/mo. Comparison: https://simpleverifier.com/compare/reoon-alternative [checked 2026-10-12]
- Mailfloss (mailfloss.com): $29 a month for 10,000 credits, or pay as you go from $8.00 per 1,000 on a 1,000 pack, falling to $1.04 at 2,500,000. Metering: monthly plans by volume, or prepaid credits that never expire. Comparison: https://simpleverifier.com/compare/mailfloss-alternative [checked 2026-10-12]
- QuickEmailVerification (quickemailverification.com): $8.00 per 1,000 on a 500 pack, falling to $0.70 at 5,000,000, pay as you go with no subscription. Metering: persistent credits that never expire, or daily credits. Comparison: https://simpleverifier.com/compare/quickemailverification-alternative [checked 2026-10-12]
- Abstract API (abstractapi.com): $19 a month for 5,000 verifications, or $204 for a year. Metering: monthly request allowance. Comparison: https://simpleverifier.com/compare/abstract-api-alternative [checked 2026-10-12]
- Mailgun (mailgun.com): $49 a month for 2,500 verifications. Metering: monthly validation allowance, overage from $1.20 per 100. Comparison: https://simpleverifier.com/compare/mailgun-validation-alternative [checked 2026-10-12]
- SendGrid (sendgrid.com): $89.95 a month. Metering: 2,500 validations included with pro. Comparison: https://simpleverifier.com/compare/sendgrid-validation-alternative [checked 2026-10-12]
- Email Hippo (emailhippo.com): $9.88 a month for 1,000 verifications. Metering: monthly, quarterly or annual plans by volume. Comparison: https://simpleverifier.com/compare/email-hippo-alternative [checked 2026-10-12]
- Voila Norbert (voilanorbert.com): $3.00 per 1,000, billed per email, pay as you go with no subscription. Metering: verification billed per email, $2 minimum. Comparison: https://simpleverifier.com/compare/voila-norbert-alternative [checked 2026-10-12]
- Anymail Finder (anymailfinder.com): $29 a month for 2,000 verifications, or $228 for a year. Metering: 400 credits/mo from $29; a verification costs 0.2 credits. Comparison: https://simpleverifier.com/compare/anymail-finder-alternative [checked 2026-10-12]
- Tomba (tomba.io): $49 a month for 2,500 verifications. Metering: half of each plan's monthly credits are labelled for verification. Comparison: https://simpleverifier.com/compare/tomba-alternative [checked 2026-10-12]
- Findymail (findymail.com): $49 a month for 1,000 verifications. Metering: verifier credits match finder credits on every plan; rollover up to 2x. Comparison: https://simpleverifier.com/compare/findymail-alternative [checked 2026-10-12]
- Bouncify (bouncify.io): $19 a month for 10,000 credits, or pay as you go from $4.00 per 1,000 on a 3,000 pack, falling to $0.50 at 2,000,000. Metering: monthly credits that reset, or packs that never expire. Comparison: https://simpleverifier.com/compare/bouncify-alternative [checked 2026-10-12]
- MailboxValidator (mailboxvalidator.com): $29.95 a month for 3,000 credits, or pay as you go from $19.95 per 1,000 on a 1,000 pack, falling to $0.70 at 1,000,000. Metering: bulk plans and api plans, each with 30-day validity. Comparison: https://simpleverifier.com/compare/mailboxvalidator-alternative [checked 2026-10-12]
- Skrapp (skrapp.io): $39 a month for 2,000 verifications, or $348 for a year. Metering: 2,000 credits/mo from $39, unused credits roll over. Comparison: https://simpleverifier.com/compare/skrapp-alternative [checked 2026-10-12]
- Mailboxlayer (mailboxlayer.com): $14.99 a month for 5,000 verifications, or $161.99 for a year. Metering: monthly api request quota. Comparison: https://simpleverifier.com/compare/mailboxlayer-alternative [checked 2026-10-12]
- Email List Validation (emaillistvalidation.com): $14 a month for 2,500 credits, or pay as you go from $7.60 per 1,000 on a 2,500 pack, falling to $0.95 at 2,000,000. Metering: monthly credits, or pay-as-you-go credits that never expire. Comparison: https://simpleverifier.com/compare/email-list-validation-alternative [checked 2026-10-12]
- Xverify (xverify.com): $10.00 per 1,000 on a 500 pack, falling to $1.00 at 2,500,000, pay as you go with no subscription. Metering: verifications bought on demand, no minimum. Comparison: https://simpleverifier.com/compare/xverify-alternative [checked 2026-10-12]
- Pabbly Email Verification (pabbly.com): $9.00 per 1,000 on a 1,000 pack, falling to $3.27 at 15,000, pay as you go with no subscription. Metering: credit plans, credits never expire. Comparison: https://simpleverifier.com/compare/pabbly-email-verification-alternative [checked 2026-10-12]
- Icypeas (icypeas.com): $19 a month for 10,000 verifications, or $190 for a year. Metering: 1,000 credits/mo from $19; a verification costs 0.1 credit. Comparison: https://simpleverifier.com/compare/icypeas-alternative [checked 2026-10-12]
- LeadMagic (leadmagic.io): $99 a month for 20,000 verifications, or $990 for a year. Metering: 5,000 credits/mo from $99; a validation costs 0.25 credits. Comparison: https://simpleverifier.com/compare/leadmagic-alternative [checked 2026-10-12]
- Enrichley (enrichley.com): $59 a month for 5,000 verifications. Metering: shared monthly credits, one per verification. Comparison: https://simpleverifier.com/compare/enrichley-alternative [checked 2026-10-12]
- EmailValidation.io (emailvalidation.io): $9.99 a month for 5,000 verifications, or $99.90 for a year. Metering: monthly api credits. Comparison: https://simpleverifier.com/compare/emailvalidation-io-alternative [checked 2026-10-12]

Some vendors are cheaper than SimpleVerifier in specific cases, and the comparison
pages say so rather than hiding it: DeBounce is cheaper for a single one-off clean
at almost any size and its monthly plan is $23 for 10,000 a month, and
EmailListVerify's $16/month (5,000) and $25/month (10,000) tiers undercut us if that
volume is genuinely all you need. SimpleVerifier wins on large lists and
on lists re-verified often, because neither of those adds to the bill.

All comparisons state who should keep paying for the competitor instead of switching.
Full table: https://simpleverifier.com/compare

Per-vendor pricing pages (https://simpleverifier.com/pricing/{vendor}), with every published tier, the
monthly cost at 1,000, 10,000, 50,000 and 100,000 emails against SimpleVerifier, the free
allowance and credit expiry, each sourced from the vendor's own pricing page:

- ZeroBounce pricing: https://simpleverifier.com/pricing/zerobounce (as of 12 Oct 2026, $99.00 for 10,000 a month)
- NeverBounce pricing: https://simpleverifier.com/pricing/neverbounce (as of 19 Oct 2026, $49.00 for 10,000 a month)
- Hunter.io pricing: https://simpleverifier.com/pricing/hunter-io (as of 20 Oct 2026, $149.00 for 10,000 a month)
- Clearout pricing: https://simpleverifier.com/pricing/clearout (as of 20 Oct 2026, $58.00 for 10,000 a month)
- Kickbox pricing: https://simpleverifier.com/pricing/kickbox (as of 19 Oct 2026, $70.00 for 10,000 a month)
- Bouncer pricing: https://simpleverifier.com/pricing/bouncer (as of 19 Oct 2026, $48.00 for 10,000 a month)
- DeBounce pricing: https://simpleverifier.com/pricing/debounce (as of 12 Oct 2026, $23.00 for 10,000 a month)
- EmailListVerify pricing: https://simpleverifier.com/pricing/emaillistverify (as of 20 Oct 2026, $25.00 for 10,000 a month)
- Emailable pricing: https://simpleverifier.com/pricing/emailable (as of 12 Oct 2026, $51.00 for 10,000 a month)
- MillionVerifier pricing: https://simpleverifier.com/pricing/millionverifier (as of 19 Oct 2026, $39.00 for 10,000 a month)
- MailerCheck pricing: https://simpleverifier.com/pricing/mailercheck (as of 12 Oct 2026, $80.00 for 10,000 a month)
- Snov.io pricing: https://simpleverifier.com/pricing/snov-io (as of 12 Oct 2026, $189.00 for 10,000 a month)
- Reoon pricing: https://simpleverifier.com/pricing/reoon (as of 12 Oct 2026, $11.90 for 10,000 a month)
- Mailfloss pricing: https://simpleverifier.com/pricing/mailfloss (as of 12 Oct 2026, $29.00 for 10,000 a month)
- QuickEmailVerification pricing: https://simpleverifier.com/pricing/quickemailverification (as of 12 Oct 2026, $60.00 for 10,000 a month)
- Abstract API pricing: https://simpleverifier.com/pricing/abstract-api (as of 12 Oct 2026, $39.00 for 10,000 a month)
- Email Hippo pricing: https://simpleverifier.com/pricing/email-hippo (as of 12 Oct 2026, $88.40 for 10,000 a month)
- Voila Norbert pricing: https://simpleverifier.com/pricing/voila-norbert (as of 12 Oct 2026, $30.00 for 10,000 a month)
- Anymail Finder pricing: https://simpleverifier.com/pricing/anymail-finder (as of 12 Oct 2026, $89.00 for 10,000 a month)
- Tomba pricing: https://simpleverifier.com/pricing/tomba (as of 12 Oct 2026, $199.00 for 10,000 a month)
- Findymail pricing: https://simpleverifier.com/pricing/findymail (as of 12 Oct 2026, $249.00 for 10,000 a month)
- Bouncify pricing: https://simpleverifier.com/pricing/bouncify (as of 12 Oct 2026, $19.00 for 10,000 a month)
- MailboxValidator pricing: https://simpleverifier.com/pricing/mailboxvalidator (as of 12 Oct 2026, $59.95 for 10,000 a month)
- Skrapp pricing: https://simpleverifier.com/pricing/skrapp (as of 12 Oct 2026, $349.00 for 10,000 a month)
- Mailboxlayer pricing: https://simpleverifier.com/pricing/mailboxlayer (as of 12 Oct 2026, $74.99 for 10,000 a month)
- Email List Validation pricing: https://simpleverifier.com/pricing/email-list-validation (as of 12 Oct 2026, $49.00 for 10,000 a month)
- Xverify pricing: https://simpleverifier.com/pricing/xverify (as of 12 Oct 2026, $70.00 for 10,000 a month)
- Pabbly Email Verification pricing: https://simpleverifier.com/pricing/pabbly-email-verification (as of 12 Oct 2026, $29.00 for 10,000 a month)
- Icypeas pricing: https://simpleverifier.com/pricing/icypeas (as of 12 Oct 2026, $19.00 for 10,000 a month)
- LeadMagic pricing: https://simpleverifier.com/pricing/leadmagic (as of 12 Oct 2026, $99.00 for 10,000 a month)
- Enrichley pricing: https://simpleverifier.com/pricing/enrichley (as of 12 Oct 2026, $149.00 for 10,000 a month)
- EmailValidation.io pricing: https://simpleverifier.com/pricing/emailvalidation-io (as of 12 Oct 2026, $34.99 for 10,000 a month)

## Roundups (tools ranked side by side)

Each roundup ranks the tools for one job by a single rule stated on the page, with each
vendor's free limit, bulk limit, price and signup requirement read off its own site.
SimpleVerifier's own tools sit wherever that rule puts them. Hub: https://simpleverifier.com/best

- Best bulk domain availability checkers (2026): https://simpleverifier.com/best/bulk-domain-availability-checkers — Ranked by the most domains one search or run accepts without an account, as each vendor publishes it. [checked 2026-10-19]
- Best email provider lookup tools (2026): https://simpleverifier.com/best/email-provider-lookup-tools — Ranked by the most domains one run looks up without creating an account; tools that need an account score 0. [checked 2026-10-19]
- Best domain age checkers (2026): https://simpleverifier.com/best/domain-age-checkers — Ranked by the most domains one run checks without an account. [checked 2026-10-19]
- Best bulk WHOIS lookup tools (2026): https://simpleverifier.com/best/bulk-whois-lookup-tools — Ranked by the most domains one run looks up without creating an account; tools that need an account score 0. [checked 2026-10-19]
- Email verification tools compared by price: https://simpleverifier.com/best/email-verification-tools — Ranked by the lowest published price to verify 10,000 addresses every month, billed month to month: a monthly plan where one exists, otherwise one 10,000-credit pack a month. [checked 2026-10-19]
- Phone number validation tools compared by price: https://simpleverifier.com/best/phone-number-validation-tools — Ranked by the lowest published monthly price for 5,000 live lookups that return carrier and line type. [checked 2026-10-19]
- Free email deliverability tools compared: https://simpleverifier.com/best/free-email-deliverability-tools — Ranked by how many domains one free run checks without creating an account; tools that need an account count as 0. [checked 2026-10-19]

## Alternatives pages

One page per vendor with a current price table, where the vendor is better, and who should
pick which. Hub: https://simpleverifier.com/alternatives

- Twilio Lookup alternative (phone): https://simpleverifier.com/compare/twilio-lookup-alternative [checked 2026-10-19]
- Numverify alternative (phone): https://simpleverifier.com/compare/numverify-alternative [checked 2026-10-19]
- Email verifier alternatives: every vendor listed under "Comparison with other services" above,
  at https://simpleverifier.com/compare/<vendor>-alternative

## Free tools (no account required)

150 free tools, grouped by category. How they work and where their data comes
from: https://simpleverifier.com/about/methodology. Every tool in full (answer, how-to steps, worked example, limits, FAQs) in one plain-text file:
https://simpleverifier.com/llms-full.txt

### Most-used tools

- Bulk domain availability checker: https://simpleverifier.com/tools/domain-availability-bulk — checks up to 100
  domains a run without an account, or up to 500 after a Google sign-in (no card), against each TLD
  registry's RDAP server and DNS. Each name is likely available,
  registered (with registrar and expiry where the registry shares them) or unknown. Likely available
  is not a guarantee: premium, reserved and blocked names can look free, and the registry and your
  registrar are the source of truth. TLDs without RDAP (.io, .co, .me, .de) show unknown unless DNS
  proves the name is registered.
- Cold email domain generator: https://simpleverifier.com/tools/cold-email-domain-generator — secondary sending-domain
  ideas built from your brand (getacme.com, acmehq.com), each checked the same way for likely availability.
- Email provider lookup: https://simpleverifier.com/tools/email-provider-lookup — names a domain's mailbox provider
  (Google Workspace, Microsoft 365, Zoho and others) and any security gateway in front of it, such as
  Proofpoint or Mimecast, from its MX and SPF records. About 40 providers and gateways are recognised.
- Domain age checker: https://simpleverifier.com/tools/domain-age-checker — registration date, age, expiry and registrar
  for up to 10 domains, from each registry's RDAP record.
- Bulk domain age checker: https://simpleverifier.com/tools/bulk-domain-age-checker — the same RDAP lookup for up to
  500 unique domains a run, pasted (up to 5,000 rows) or uploaded as CSV, with age filters and a CSV download.
- Bulk domain expiry checker: https://simpleverifier.com/tools/bulk-domain-expiry-checker — expiry date, days left and
  registrar for up to 500 unique domains a run from the same RDAP lookup, grouped into expired or in grace,
  under 30 days, 30–90 days and 90+ days. TLDs without RDAP (.io, .co, .me, .de) show unknown.
- Bulk WHOIS lookup: https://simpleverifier.com/tools/bulk-whois-lookup — RDAP (the modern WHOIS) records for up to 500
  domains a run: registrar, created, updated and expiry dates, EPP status codes, nameservers and DNSSEC,
  with a CSV export.
- Bulk email authentication checker: https://simpleverifier.com/tools/bulk-email-authentication-checker — SPF, DKIM
  (common provider selectors), DMARC and MX for up to 100 domains a run, or 500 after a Google sign-in.
  Each domain gets pass, warn or fail with a plain-English reason, and the table downloads as CSV. DNS
  only; an account-specific DKIM selector can't be found and shows as a warning, not a fail.
- Bulk DNS lookup: https://simpleverifier.com/tools/bulk-dns-lookup — A, AAAA, MX, TXT, NS and CNAME records (pick any)
  for up to 100 domains or host names a run, or 500 after a Google sign-in, in one table with a CSV
  export. Names that don't exist (NXDOMAIN) and timed-out lookups are marked separately from empty records.
- Bulk website status and parked domain checker: https://simpleverifier.com/tools/bulk-website-status-checker — for up
  to 100 domains a run, or 500 after a Google sign-in: HTTP status, every redirect hop and the final URL,
  the page title, and a "looks parked" or "looks for sale" label naming the signal seen (parking-service
  nameservers, a redirect to a domain marketplace, or parking phrases on the page). Labels are heuristics;
  sites that block automated requests can show 403 or time out. CSV export.
- Company name to domain finder: https://simpleverifier.com/tools/company-name-to-domain — likely website domain for up
  to 50 company names a run, or 250 after a Google sign-in. Answers come from Wikidata's official website
  property (P856) or from guessed domains (name.com, name.io, name.co) that resolve and whose home page title
  names the company. Each row has high, medium or low confidence and the reason; low means a guess. No search
  engine scraping. Small local businesses are often not found. CSV export.
- Domain to company name lookup: https://simpleverifier.com/tools/domain-to-company-name — the company or site name for
  up to 50 domains or work email addresses a run, or 250 after a Google sign-in: the organisation Wikidata
  lists for the domain as its official website, else the site's own og:site_name or application-name tag,
  else the matching part of its page title. Each row has a confidence level, the source and the email
  provider from MX. Names from page tags can be brands rather than legal entities. CSV export.
- Email spoofing test: https://simpleverifier.com/tools/email-spoofing-test — answers "can someone send mail as
  you@yourdomain?" from DNS: no DMARC record or p=none = can be spoofed; p=quarantine, pct below 100 or
  sp=none on subdomains = partly protected; p=reject = protected (receivers that check DMARC refuse forged
  mail). SPF ending in +all is flagged as spoofable whatever the DMARC policy. One domain or up to 100 a
  run (500 after a Google sign-in), with the fix for each gap and a CSV.
- DKIM selector finder: https://simpleverifier.com/tools/dkim-selector-finder — finds a domain's DKIM selectors without
  knowing them: tries about 80 known selectors (google, selector1/2, k1-k3, s1/s2, mte1, cm and others) and
  shows each key found with its type, length (under 2048 bits = weak) and platform. The platform is certain
  when the selector is a CNAME to the platform's domain, and marked "usually" when it is only inferred from
  the selector name. Account-specific selectors (Amazon SES, Postmark, HubSpot) can't be found from DNS.
- Bulk catch-all checker: https://simpleverifier.com/tools/bulk-catch-all-checker — catch-all (accept-all), not
  catch-all or unknown for each domain in a list, from a live SMTP probe of one random address per domain
  (never an address the visitor types). 25 domains an hour without an account, 200 an hour after a Google
  sign-in; answers cached a day per domain. It shares the verification server's daily port 25 allowance,
  so runs stop early, with a message, when the free tools' share runs low (reset 00:00 UTC). Gmail and
  other consumer providers that hide mailbox status show unknown. CSV export.
- Email stack lookup: https://simpleverifier.com/tools/email-stack-lookup — which email tools a company uses, from DNS
  only: mailbox provider and security gateway (MX), sending platforms such as SendGrid, Mailchimp, HubSpot,
  Klaviyo or Amazon SES (SPF includes and DKIM CNAMEs, about 40 selectors), DMARC reporting service (rua=)
  and about 40 SaaS domain verification records (google-site-verification, MS=, atlassian, facebook and
  others). Every platform lists the record that shows it; one named only from a DKIM selector's name is
  marked likely. One domain or up to 100 a run (500 after a Google sign-in), filter by platform, CSV.
- Bulk disposable email checker: https://simpleverifier.com/tools/bulk-disposable-email-checker — flags disposable or
  temporary addresses in a pasted list or CSV: each domain is checked against the disposable-domain list
  (real mail providers removed) and its MX records, so a domain whose mail servers belong to a listed
  disposable service is flagged too, and domains that can't receive mail are marked. Only domains are sent.
  No cap on addresses; 1,000 unique domains a run, 5,000 after a Google sign-in. Clean list and report CSV.
- Signup email risk checker: https://simpleverifier.com/tools/email-domain-risk-checker — flags risky addresses in a
  signup export, each flag with its reason. High risk: disposable domain or disposable MX, a domain that
  can't receive mail, parking-service nameservers, registered under 30 days ago (registry RDAP, company
  domains only), invalid syntax. Review: likely typo of a big mail domain, under 180 days old, not in the
  registry. Low: role address. Webmail is labelled, not flagged. Signals only, not proof of fraud; it
  doesn't check mailboxes. 100 unique domains a run, 500 after a Google sign-in; only domains are sent. CSV.
- Domain drop date calculator: https://simpleverifier.com/tools/domain-drop-date-calculator — when an expired domain could
  become available: reads each domain's registry RDAP record (expiry, last-changed date, EPP status) and
  gives its phase (registered, auto-renew grace, redemption period, pending delete, not registered) and
  the earliest and latest release dates on ICANN's typical gTLD cycle (up to 45 days grace, 30 days
  redemption, 5 days pending delete). A window, not a promise: registrars can renew or auction names.
  Country-code TLDs get no dates. One domain or up to 100 a run (500 after a Google sign-in), CSV.
- Website email extractor: https://simpleverifier.com/tools/website-email-extractor — the email addresses a website
  publishes: reads the page entered plus up to 4 linked contact, about, team or imprint pages on the same
  site (5 pages max, no crawling, no login, no cookies), only where robots.txt allows; if robots.txt errors
  the site isn't read. Lists addresses from mailto links and page text (including "[at]" spellings), each
  with its source page and whether it's on the site's own domain. 10 websites an hour, 50 after a Google
  sign-in. Published doesn't mean working: verify before sending. CSV.
- Bulk nameserver lookup: https://simpleverifier.com/tools/bulk-nameserver-lookup — NS records for up to 100 domains a
  run (500 after a Google sign-in), each nameserver named by the company that runs it (Cloudflare, Amazon
  Route 53, Google Cloud DNS, Azure, NS1, GoDaddy, Namecheap, web hosts and about 40 in all, or "its own
  nameservers"), with parking-service nameservers flagged and unrecognised ones listed, not guessed. A
  subdomain without NS records is read from its parent zone. DNS only; filter by host; CSV.
- Which ESP sent this email?: https://simpleverifier.com/tools/which-esp-sent-this-email — paste an email's raw headers
  (or upload an .eml) to see the platform that sent it, in the browser: DKIM d= signing domain, Return-Path
  bounce domain, the sending side of the Received chain (the recipient's own servers are skipped), headers
  platforms add (X-SG-EID SendGrid, X-Mailgun-Sid Mailgun, X-SES-Outgoing Amazon SES, X-PM-Message-Id
  Postmark, X-MC-User Mailchimp, X-Mailin-EID Brevo), List-Unsubscribe and Message-ID hosts. Each platform
  lists its evidence; one set up fully on the sender's own domains may not show. No limit, nothing uploaded.
- Bulk phone number validator: https://simpleverifier.com/tools/bulk-phone-number-validator — checks a pasted list or CSV
  against each country's numbering plan (libphonenumber, in the browser): valid format, wrong length or
  unallocated prefix, plus E.164, international form, country, calling code and the line type the range
  was issued for. Format only: it never says a number is in service or reachable. Other columns kept;
  500 rows a run, 25,000 after a Google sign-in. Report, valid-only and invalid-only CSVs.
- Phone number splitter: https://simpleverifier.com/tools/phone-number-splitter — splits each number into country code,
  area code, local number and extension columns (plus national number, E.164, country). On +1 the area
  code is the first three digits; elsewhere the first group of a landline as the country's plan writes
  it; mobiles, non-geographic numbers and countries without area codes get none. In the browser, CSV.
- Phone list segmenter: https://simpleverifier.com/tools/phone-list-segmenter — splits a phone list or CSV into one file
  per country, calling code, line type range, format check or US and Canada area code, from the numbering
  plan, with the original columns kept and an all-in-one file with a segment column. In the browser.
- Email list bounce rate estimator: https://simpleverifier.com/tools/email-list-bounce-rate-estimator — an estimate, not
  a verification: from a pasted list (or counts) it gives a range. Floor: invalid syntax and domains with
  no mail server (MX lookup, domains only sent). Top: adds typo domains, disposable inboxes and operations
  role addresses. Duplicates are left out. Closed mailboxes on working domains aren't visible, so the
  real rate can be higher. 500 rows a run, 5,000 after a Google sign-in; counts mode has no limit.
- Email list splitter: https://simpleverifier.com/tools/email-list-splitter — splits a list or CSV into files of a set
  number of rows or a set number of files (up to 500), in order or dealt in turn so each file gets a mix
  of the list, with the header row and every column in each part. In the browser.
- Extract email and phone from CSV: https://simpleverifier.com/tools/extract-email-and-phone-from-csv — searches every
  cell of every row of a CSV (or each line of text) and adds email, other_emails, phone and other_phones
  columns to the original rows; phones are kept only when valid for their country (so dates, prices and
  order numbers are skipped) and written in E.164 or international form; "[at]" spellings optional.
  Unique email and phone lists too. In the browser.
- Available domain name generator: https://simpleverifier.com/tools/available-domain-name-generator — domain ideas from
  up to three keywords using fixed prefix, suffix and join patterns (no AI), the best 60 checked per run
  against registry RDAP and DNS. Likely available is not a guarantee; the registrar confirms.
- Cold email bounce cost calculator: https://simpleverifier.com/tools/cold-email-bounce-cost-calculator — list size,
  expected bounce rate, sends a day and inboxes give estimated bounces in total, a day and per inbox, the
  published 2% to 10% platform lines before and after the share verification is assumed to remove (an
  input, not a claim), and the cost of one verification pass here and at other verifiers from dated prices.
- Email verification cost calculator: https://simpleverifier.com/tools/email-verification-cost-calculator — enter a list
  size and how often you verify it to see the cost at SimpleVerifier and 8 other verifiers, from prices
  read from each vendor's pricing page on 19 Oct 2026. Some vendors cost less for some jobs, and the
  table shows when.

### Free email list tools (https://simpleverifier.com/tools/category/email-list)

- Email checker: https://simpleverifier.com/tools/verify-email — Check whether one email address exists with a live SMTP mailbox check, plus catch-all and disposable detection.
- List health check: https://simpleverifier.com/tools/email-list-health-check — Upload a CSV and find duplicates, bad syntax, typo domains, disposable and role addresses and dead domains, in your browser.
- Email permutator: https://simpleverifier.com/tools/email-permutator — Turn a name and company domain into the likely email formats, most common first, and check the top ones live.
- Disposable email checker: https://simpleverifier.com/tools/disposable-email-checker — Check whether an address or domain belongs to a known disposable (temporary) email provider.
- Email extractor: https://simpleverifier.com/tools/email-extractor — Paste a thread, a web page's HTML or a messy export, or upload a CSV. Every address is extracted, deduplicated and ready to download. Runs in your browser.
- Remove duplicate emails: https://simpleverifier.com/tools/remove-duplicate-emails — Case-insensitive deduplication for a pasted list or a whole CSV, keeping every other column. Optional Gmail dot and +tag matching. Runs in your browser.
- Bulk email syntax checker: https://simpleverifier.com/tools/bulk-email-syntax-checker — Paste or upload any number of addresses and get the exact format error on each one, with the RFC rule it breaks and a fix for typo domains. Syntax only, in your browser.
- Email list cleaner: https://simpleverifier.com/tools/email-list-cleaner — Paste "Name <email>" lists, Outlook recipients or messy CSV rows and get email, first name and last name columns, trimmed, lowercased and deduplicated. In your browser.
- Extract emails from Excel: https://simpleverifier.com/tools/extract-emails-from-excel — Upload an Excel, Google Sheets export or CSV file and pull every address from every sheet and cell, deduplicated, with where each was found. Runs in your browser.
- Role-based email filter: https://simpleverifier.com/tools/role-based-email-filter — Flag or remove role-based addresses in bulk, using 148 prefixes in three groups, with your CSV columns kept. Runs in your browser.
- Business email checker: https://simpleverifier.com/tools/free-vs-business-email-filter — Split a list into company addresses and free ones (Gmail, Outlook.com, Yahoo, ISP mail) using 158 free mailbox domains, and download each part.
- Bulk email permutator: https://simpleverifier.com/tools/bulk-email-permutator — Upload names and domains and get the likely address formats for every row, most common first, as a CSV ready to verify. Runs in your browser.
- Extract domain from email: https://simpleverifier.com/tools/email-to-domain-extractor — Turn a list of addresses into its domains: a domain column for each row, unique domains with counts, and company versus free mail. Runs in your browser.
- Compare email lists: https://simpleverifier.com/tools/compare-email-lists — Paste a send list and a suppression list and get A minus B, the overlap and the union, matched case-insensitively with your CSV columns kept. Runs in your browser.
- Email typo fixer: https://simpleverifier.com/tools/email-typo-corrector — Paste a list or upload a CSV to correct misspelled webmail domains, .con endings and formatting slips, with each fix shown for you to accept or reject. Runs in your browser.
- Gmail address normalizer: https://simpleverifier.com/tools/gmail-address-normalizer — Turn jane.doe+trial2@gmail.com and J.A.N.E.DOE@googlemail.com into one canonical address, grouped and counted, without deleting rows. Runs in your browser.
- Extract emails from PDF: https://simpleverifier.com/tools/extract-emails-from-pdf — Drop a PDF to pull every email address from every page, including mailto links, deduplicated with page numbers. The file is read in your browser.
- Name from email: https://simpleverifier.com/tools/name-from-email — Bulk-guess first and last names from address patterns like john.smith@, with a confidence for each and role addresses left blank, ready for a mail merge.
- Free email domains list: https://simpleverifier.com/tools/free-email-providers-list — Search or download the 158 freemail and ISP domains our own filters use, as CSV, JSON, TXT or a JavaScript Set.
- CSV merger: https://simpleverifier.com/tools/csv-merge — Merge up to 20 CSVs, match columns by header name even when each export spells them differently, and drop duplicate emails. Runs in your browser.
- SHA-256 email hasher: https://simpleverifier.com/tools/email-hasher-customer-match — Applies each platform's normalisation rules (lower case, trimmed, E.164 phones, Gmail dots for Google) then SHA-256, in the browser, with an upload-ready CSV.
- Email regex tester: https://simpleverifier.com/tools/email-regex-tester — Runs your addresses through four standard patterns and your own, shows where they disagree, and gives code that behaves the same in JavaScript, Python, PHP and Go.
- VCF to CSV converter: https://simpleverifier.com/tools/vcf-to-csv — Reads vCard 2.1, 3.0 and 4.0 exports, including accented names and multiple emails or phones per contact, and writes a CSV for Excel, a CRM or Google Contacts.
- Split full name: https://simpleverifier.com/tools/split-full-name — Separates prefix, first, middle, last, suffix and nickname, reads Last, First order, keeps van and de la with the surname, and flags companies and one-word names.
- MBOX to CSV: https://simpleverifier.com/tools/mbox-to-csv — Drop an .mbox or .eml export and get every From, To and Cc address with names, message counts and dates, as a CSV. The file never leaves your browser.
- Email list sampler: https://simpleverifier.com/tools/email-list-sampler — Draw a seeded random sample (500 rows by default) from a list or CSV, keep every column, and turn the sample's bounce count into a range for the whole list.
- Email list formatter: https://simpleverifier.com/tools/email-list-formatter — Converts between one-per-line, comma and semicolon separated lists, strips names, brackets and mailto:, removes duplicates and splits into batches per message.
- Email list template: https://simpleverifier.com/tools/email-list-template — Download a CSV template with the headers each platform expects, then check your own file for a missing email column, bad header row or the wrong separator.
- LinkedIn connections to email list: https://simpleverifier.com/tools/linkedin-connections-to-email-list — Reads Connections.csv as LinkedIn exports it, skips the notes at the top, keeps the connections that shared an email and splits work from personal addresses.
- Email list segmenter: https://simpleverifier.com/tools/email-list-segmenter — Groups a list or CSV by domain, mailbox provider family, company vs free vs ISP mail, or country-code TLD, with a CSV per segment and every other column kept. In your browser.
- Bulk disposable email checker: https://simpleverifier.com/tools/bulk-disposable-email-checker — Paste a list or upload a CSV. Each address is checked against a list of disposable domains and its domain's MX records, then you download the list without them.
- Signup email risk checker: https://simpleverifier.com/tools/email-domain-risk-checker — Paste or upload signup emails. Each one is checked for disposable, parked, brand-new or dead domains, typos and role addresses, with the reason for every flag.
- Website email extractor: https://simpleverifier.com/tools/website-email-extractor — Enter a website. Its page and up to four linked contact, about or team pages are read, where robots.txt allows, and every published address is listed with its page.
- Bounce rate estimator: https://simpleverifier.com/tools/email-list-bounce-rate-estimator — Paste a list or enter counts and get a bounce rate range from the problems visible in the addresses and their domains. Clearly an estimate, not a verification.
- Email list splitter: https://simpleverifier.com/tools/email-list-splitter — Split a list or CSV by rows per file or number of files, in order or dealt in turn so each file gets a mix, with the header row and columns in every part.
- Email and phone extractor for CSV: https://simpleverifier.com/tools/extract-email-and-phone-from-csv — Every cell of every row is searched; each row gets clean email and phone columns, with your original columns kept, plus unique lists of each. In your browser.
- CSV import formatter: https://simpleverifier.com/tools/csv-import-formatter — Upload any export, match its columns to the fields the sending tool expects, and download a UTF-8, comma-separated file with custom variables named the way that tool writes them.

### Free phone number tools (https://simpleverifier.com/tools/category/phone)

- Phone number validator: https://simpleverifier.com/tools/phone-number-validator — Check one phone number against its country's numbering plan and get its E.164 format, country and line type.
- Phone number formatter: https://simpleverifier.com/tools/phone-number-formatter — Paste a list or upload a CSV, pick the default country, and get every number in E.164, international or national format. Runs in your browser.
- Phone number extractor: https://simpleverifier.com/tools/phone-number-extractor — Paste notes, web pages or exports and get every phone number once, in E.164, without dates, prices or order numbers. Runs in your browser.
- Landline or mobile checker: https://simpleverifier.com/tools/landline-or-mobile-checker — Paste a list or upload a CSV and get each number's line type from its country's numbering plan, with US and Canada numbers flagged where the digits can't tell.
- SMS character counter: https://simpleverifier.com/tools/sms-character-counter — Type or paste a text message and see characters, GSM-7 or Unicode encoding, segments, and the exact characters that cut your limit from 160 to 70.
- Area code time zone lookup: https://simpleverifier.com/tools/area-code-time-zone — Paste area codes or phone numbers to get each one's time zone, local time and a callable-now flag for the 8am to 9pm window. Built on NANPA's area code database.
- Phone number country lookup: https://simpleverifier.com/tools/phone-number-country-lookup — Paste a list or upload a CSV and get each number's country and calling code, including which of the 25 places on +1 a number belongs to.
- Add or remove country code: https://simpleverifier.com/tools/add-remove-country-code — Add or strip a country code across a pasted list or a CSV column, with or without the +, handling the leading 0 that national numbers drop.
- Remove duplicate phone numbers: https://simpleverifier.com/tools/remove-duplicate-phone-numbers — Normalises every number to E.164 before comparing, so brackets, dots, spaces and +1 don't hide duplicates. Keeps the first row and all its columns.
- GSM-7 character checker: https://simpleverifier.com/tools/gsm-character-checker — Lists every non-GSM character with what to replace it with, converts accents, smart quotes and emoji in one click, and shows the full GSM-7 set.
- Toll-free number checker: https://simpleverifier.com/tools/toll-free-number-checker — Flags toll-free, premium-rate and shared-cost numbers in any country from the numbering plan, and downloads the list without them.
- Phone number regex tester: https://simpleverifier.com/tools/phone-number-regex — E.164, US (NANP), UK and a loose input filter, with code for JavaScript, Python and PHP, and a bulk tester that shows which matches aren't real numbers.
- NPA-NXX lookup: https://simpleverifier.com/tools/npa-nxx-lookup — Reads NANPA's public assignment files for the rate center, state, LATA and the carrier that was first given the prefix or its 1,000-number block.
- WhatsApp link generator: https://simpleverifier.com/tools/whatsapp-link-generator — Builds a wa.me link and QR code in WhatsApp's documented format, with the number cleaned to international format. A list of numbers works too.
- Country calling code lookup: https://simpleverifier.com/tools/country-code-lookup — Search by country or by code, both ways, for all 245 countries and territories in the numbering-plan data, with exit and trunk prefixes and a dial helper.
- 10DLC sample message and SMS opt-in generator: https://simpleverifier.com/tools/sms-compliance-message-generator — Fills in consent checkbox text, keyword calls to action, opt-in, HELP and STOP replies, campaign samples and the privacy clause from your brand details.
- Area code lookup: https://simpleverifier.com/tools/area-code-lookup — State or province, largest rate centers, time zone and overlays for every North American area code, a reverse search by state or city, and a bulk mode for lists. NANPA and CNAC data.
- CSV to VCF converter: https://simpleverifier.com/tools/csv-to-vcf — Paste or upload a CSV or .xlsx of contacts and download one .vcf file with names, phones, emails, company and notes, ready for iPhone, Android, Google or Outlook. In your browser.
- TCPA calling hours checker: https://simpleverifier.com/tools/tcpa-calling-hours-checker — Local time for each number from its area code, checked against the federal 8 a.m. to 9 p.m. rule and 19 stricter state rules quoted from statute, with the next allowed time. Not legal advice.
- Click-to-call link generator: https://simpleverifier.com/tools/click-to-call-link-generator — Turns a number into a tel: link and an sms: link with a pre-filled message, in E.164 form, with the HTML anchor to paste. Bulk mode for a list. In your browser.
- Bulk phone number validator: https://simpleverifier.com/tools/bulk-phone-number-validator — Paste numbers or upload a CSV and get each one's format check, E.164 form, country and line type range from the numbering plan, with your columns kept.
- Phone number splitter: https://simpleverifier.com/tools/phone-number-splitter — Paste a list or upload a CSV and get country code, area code, local number and extension as separate columns, read from each country's numbering plan.
- Phone list segmenter: https://simpleverifier.com/tools/phone-list-segmenter — Group a pasted list or CSV by country, calling code, line type range, format check or US and Canada area code, with a CSV per segment and your columns kept.
- Phone number QR code generator: https://simpleverifier.com/tools/phone-number-qr-generator — Turn a number into a QR code that starts a call (tel:), opens a text message (sms:) or saves a full contact card (vCard 3.0 or 4.0). Download PNG or SVG for print.
- Vanity number converter: https://simpleverifier.com/tools/vanity-number-converter — Convert letters to keypad digits for dialling, or list the English words a number spells for a memorable vanity number. Spellings only; it never says a number is available.

### Free email deliverability tools (https://simpleverifier.com/tools/category/deliverability)

- Catch-all checker: https://simpleverifier.com/tools/catch-all-checker — Test whether a domain accepts mail for every address by probing a random address that cannot exist.
- Email header analyzer: https://simpleverifier.com/tools/email-header-analyzer — Paste raw headers to see SPF, DKIM and DMARC results, alignment, every hop with its delay, and spam verdicts.
- Deliverability audit: https://simpleverifier.com/tools/deliverability — Audit a domain's MX, SPF, DKIM, DMARC and blocklist status in one pass, with what each result means.
- SPF record generator: https://simpleverifier.com/tools/spf-generator — Build a valid SPF TXT record from the services that send for your domain, with a live count against the 10-lookup limit.
- DMARC record generator: https://simpleverifier.com/tools/dmarc-generator — Build a DMARC TXT record with the right policy and reporting address, and see plainly when p=none enforces nothing.
- MX record lookup: https://simpleverifier.com/tools/mx-lookup — Free MX lookup: check the MX records for any domain and see which mail servers accept its email, in priority order, and which provider runs them.
- SPF record checker: https://simpleverifier.com/tools/spf-checker — Free SPF record checker: look up a domain's SPF TXT record, see the raw value, and catch missing records, duplicate records and soft-fail policies.
- DMARC record checker: https://simpleverifier.com/tools/dmarc-checker — Check any domain's DMARC record: see the raw TXT at _dmarc, the policy (none, quarantine or reject) and what it actually enforces. Free DMARC lookup.
- DKIM checker: https://simpleverifier.com/tools/dkim-checker — Check DKIM records on any domain, no selector needed: auto-detects common selectors, decodes key length and flags weak, revoked or broken keys. Free.
- Email blacklist check: https://simpleverifier.com/tools/blacklist-check — Free email blacklist check: see if your domain is listed on Spamhaus DBL, SURBL or SpamCop, with refused queries shown as unchecked, not as a false alarm.
- Gmail & Yahoo bulk sender checker: https://simpleverifier.com/tools/bulk-sender-checker — One domain in, a checklist out: SPF, DKIM, DMARC, PTR and MX from live DNS, plus one-click unsubscribe, alignment and spam rate as manual items.
- Reverse DNS lookup: https://simpleverifier.com/tools/reverse-dns-lookup — Enter an IPv4 or IPv6 address to get its PTR hostname, plus the forward-confirm check that Gmail and Yahoo require on sending IPs.
- Email provider lookup: https://simpleverifier.com/tools/email-provider-lookup — Enter a domain or address and see its mail provider and any security gateway (Proofpoint, Mimecast, Barracuda), read from MX and SPF records.
- Bounce message analyzer: https://simpleverifier.com/tools/bounce-message-analyzer — Paste an Undeliverable or Delivery Status Notification email and get the code, hard or soft, the likely cause and the fix. Runs in your browser.
- Spam words checker: https://simpleverifier.com/tools/spam-words-checker — Paste email copy to see which phrases match published SpamAssassin rules or break Google's sender guidelines, and which flags are only common advice. Runs in your browser.
- Subject line tester: https://simpleverifier.com/tools/subject-line-tester — Preview a subject line and preheader in Apple Mail, the Gmail app and Gmail on desktop, and check it against published filter rules and Google's guidelines.
- IP blacklist check: https://simpleverifier.com/tools/ip-blacklist-check — Check an IPv4 address against Spamhaus ZEN, Barracuda, SpamCop, PSBL and Mailspike, with each listing code explained and unreachable lists reported honestly.
- BIMI checker: https://simpleverifier.com/tools/bimi-checker — Check a domain's BIMI record, SVG Tiny PS logo, VMC or CMC certificate and DMARC policy against Google's and the BIMI Group's published requirements.
- Domain age checker: https://simpleverifier.com/tools/domain-age-checker — Registration date, age, expiry and registrar for up to 10 domains, read from each registry's RDAP server, with honest gaps where a registry publishes nothing.
- DKIM key generator: https://simpleverifier.com/tools/dkim-generator — Create a 2048-bit DKIM key pair and the selector._domainkey TXT record in your browser. The private key never leaves the page.
- Microsoft sender requirements checker: https://simpleverifier.com/tools/microsoft-sender-requirements-checker — Check SPF, DKIM and DMARC against Microsoft's high-volume sender requirements for Outlook.com, Hotmail and Live, with its recommendations listed separately.
- Bulk MX / provider lookup: https://simpleverifier.com/tools/bulk-email-provider-lookup — Upload a CSV of emails or domains, get each row's mail provider from MX and SPF, and download the list split into Google, Microsoft and other.
- List-Unsubscribe header generator: https://simpleverifier.com/tools/list-unsubscribe-header-generator — Builds the two one-click unsubscribe headers from your URL, and checks pasted headers for HTTPS, the exact Post value, a recipient token and DKIM coverage.
- DNS lookup: https://simpleverifier.com/tools/dns-lookup — A, AAAA, CNAME, MX, NS, TXT, SOA and CAA in one lookup, with the email records (MX, SPF, DMARC) summarised and linked to the in-depth checkers.
- TXT record lookup: https://simpleverifier.com/tools/txt-record-lookup — Shows TXT records on the domain and on _dmarc, default._bimi, _mta-sts and _smtp._tls, labels SPF, DKIM, DMARC and verification tokens, and flags duplicates.
- DMARC report analyzer: https://simpleverifier.com/tools/dmarc-report-analyzer — Turns rua XML attachments from Google, Microsoft and Yahoo into a table of sending IPs, pass rates and unaligned senders. Unzipped in your browser.
- Cold email template generator: https://simpleverifier.com/tools/cold-email-generator — Fill in your offer once and get three drafts (trigger-led, quick question, problem-agitate-solve and more) with subject lines. Templates, not AI.
- Spintax checker: https://simpleverifier.com/tools/spintax-checker — Checks {a|b} and {{RANDOM | a | b}} syntax with line and column for every error, counts the variations and shows random renders. Merge fields are left alone.
- CNAME lookup: https://simpleverifier.com/tools/cname-lookup — Follows the CNAME chain, checks the target against Instantly, Smartlead or lemlist, catches the doubled-domain and proxied-record mistakes, and tests HTTPS.
- WHOIS lookup: https://simpleverifier.com/tools/whois-lookup — Registrar, creation and expiry dates, EPP status, name servers and DNSSEC from the registry's own RDAP server, with contact records hidden until you ask.
- HTML to plain text email converter: https://simpleverifier.com/tools/html-to-plain-text-email — Paste HTML email source and get a readable text/plain alternative: headings, lists and links kept, pixels and hidden preheaders dropped, lines wrapped at 78.
- SPF lookup counter: https://simpleverifier.com/tools/spf-lookup-counter — Expands every include and redirect, counts DNS lookups and void lookups against RFC 7208's limits, and shows which include uses the most.
- DKIM signature validator: https://simpleverifier.com/tools/dkim-signature-validator — Paste a raw message to recompute the body hash and check the signature against the published key, with the reason when it fails.
- Cold email subject line generator: https://simpleverifier.com/tools/cold-email-subject-line-generator — Turns your topic, outcome and trigger into five styles of subject line, each checked against spam-filter rules and phone width.
- BIMI record generator: https://simpleverifier.com/tools/bimi-generator — Build the BIMI TXT record from your logo and certificate URLs, get the host name to publish it at, and check DMARC is at enforcement first.
- Email size checker: https://simpleverifier.com/tools/email-size-checker — Measures the HTML in KB against Gmail's roughly 102 KB clipping point, breaks down what makes it heavy, and gives you a minified copy.
- MTA-STS checker: https://simpleverifier.com/tools/mta-sts-checker — Reads the _mta-sts and TLS-RPT records, fetches the policy file over HTTPS the way a sending server does, and checks every MX host against it.
- SMTP settings lookup: https://simpleverifier.com/tools/smtp-settings-lookup — Detects who hosts a domain's mail from its MX records and shows that provider's SMTP, IMAP and POP settings, each from the provider's own docs.
- Inbox preview: subject and preview text: https://simpleverifier.com/tools/email-preview-text-checker — Simulated Gmail, Outlook and iPhone inbox rows show where the subject and preheader get cut, and what an email's HTML puts in the preview.
- Email signature generator: https://simpleverifier.com/tools/email-signature-generator — Fill in your details, pick a layout and colour, and copy a table-based HTML signature that pastes cleanly into Gmail, Outlook and Apple Mail.
- DNS propagation checker: https://simpleverifier.com/tools/dns-propagation-checker — Asks 12 public DNS-over-HTTPS resolvers and the zone's own name server for one record, shows each answer as it came back, and how long each cache keeps an old one.
- SPF flattener: https://simpleverifier.com/tools/spf-flattener — Resolves every include, a and mx in an SPF record to the ip4 and ip6 ranges behind them, outputs the flattened record (split into sub-records when it's too long) and warns that it goes stale.
- MX records generator: https://simpleverifier.com/tools/google-workspace-mx-records — Pick Google Workspace, Microsoft 365, Zoho, Fastmail or iCloud+ and a DNS host; get the MX, SPF, DKIM and DMARC records from the provider's own guide, ready to paste.
- Mailto link generator: https://simpleverifier.com/tools/mailto-link-generator — Type the address, subject and message and copy a mailto: link that opens a ready-to-send draft, as a plain link, HTML or Markdown. Spaces and line breaks are encoded the way RFC 6068 asks.
- TLS-RPT record checker: https://simpleverifier.com/tools/tls-rpt-checker — Enter a domain to read its _smtp._tls TXT record, validate it against RFC 8460 (case-sensitive tags, one record only) and check that every mailto: or https: destination can receive reports.
- BIMI SVG validator and converter: https://simpleverifier.com/tools/bimi-svg-validator — Paste or upload an SVG to check it against the SVG Tiny PS profile and Gmail's requirements, then download a converted copy with before and after previews. Runs in your browser.
- Bulk domain availability checker: https://simpleverifier.com/tools/domain-availability-bulk — Paste up to 100 domains (500 when signed in), or bare names to try across .com, .io and other TLDs, and see which are registered and which look available, straight from each registry's RDAP server.
- Bulk SPF, DKIM and DMARC checker: https://simpleverifier.com/tools/bulk-email-authentication-checker — Paste a list of domains and see, for each one, whether SPF, DKIM, DMARC and MX are published, with a pass, warn or fail and the reason in plain English.
- Bulk DNS lookup: https://simpleverifier.com/tools/bulk-dns-lookup — Paste a list of domains or host names and get their A, AAAA, MX, TXT, NS and CNAME records side by side, in one table and one CSV.
- Bulk website status and parked domain checker: https://simpleverifier.com/tools/bulk-website-status-checker — Paste a list of domains and see each one's HTTP status, where it redirects, and whether it looks parked or for sale, with the signal that says so.
- Company name to domain finder: https://simpleverifier.com/tools/company-name-to-domain — Paste company names and get the likely domain for each, with high, medium or low confidence and the reason, from Wikidata and a check of the home page.
- Domain to company name lookup: https://simpleverifier.com/tools/domain-to-company-name — Paste domains or work email addresses and get the company or site name for each, with high, medium or low confidence, the source and the mail server.
- Email spoofing test: https://simpleverifier.com/tools/email-spoofing-test — Enter a domain, or a list, and get a plain yes, partly or no from its DMARC and SPF records, with what to change to stop forged mail.
- DKIM selector finder: https://simpleverifier.com/tools/dkim-selector-finder — Enter a domain and see which of about 80 known DKIM selectors it publishes, with each key's length and the sending platform where DNS shows it.
- Bulk catch-all checker: https://simpleverifier.com/tools/bulk-catch-all-checker — Paste domains or email addresses and see, for each domain, whether its mail server accepts a made-up address: catch-all, not catch-all or unknown, with the reason.
- Email stack lookup: https://simpleverifier.com/tools/email-stack-lookup — Paste company domains and see each one's mailbox provider, sending platforms, security gateway, DMARC reporting and verified SaaS, with the DNS record behind each.
- Domain drop date calculator: https://simpleverifier.com/tools/domain-drop-date-calculator — Enter a domain or a list. Each one's registry status and expiry date give its phase and the window in which it could be deleted and released.
- Bulk nameserver lookup: https://simpleverifier.com/tools/bulk-nameserver-lookup — Paste domains and get each one's NS records with the company that runs them (Cloudflare, Route 53, GoDaddy, Namecheap and about 40 others), plus parked domains, in one table.
- Which ESP sent this email?: https://simpleverifier.com/tools/which-esp-sent-this-email — Paste the raw headers of any email and see the platform that sent it, such as SendGrid, Mailchimp or Amazon SES, with the DKIM, bounce and Received lines behind it.
- Cold email domain generator: https://simpleverifier.com/tools/cold-email-domain-generator — Enter your brand or domain, pick prefixes, suffixes and TLDs, and get sending-domain ideas like getacme.com and acmehq.com, each checked against the registry for likely availability.
- Lookalike domain checker: https://simpleverifier.com/tools/lookalike-domain-checker — Enter your domain to generate up to 150 typo, homoglyph, Unicode and TLD variants and see which are registered, which answer on the web and which have MX records to send or receive email.
- MTA-STS generator: https://simpleverifier.com/tools/mta-sts-generator — Enter your domain, pull in your MX hosts and pick a mode to get the mta-sts.txt policy file, the _mta-sts TXT record and a matching TLS-RPT record, checked against RFC 8461.
- Is Gmail down?: https://simpleverifier.com/tools/is-gmail-down — Reads Google's own status feed for open Gmail incidents and connects to Gmail's mail servers to read their greeting, with the time of each check. Outlook.com too, from Microsoft's status page.
- UTM builder: https://simpleverifier.com/tools/utm-builder — Paste a URL, pick an email or SMS preset and get a tagged link that GA4 counts in the right channel. Tag hundreds of URLs at once and download them as a CSV.
- EML viewer: https://simpleverifier.com/tools/eml-viewer — Drop an .eml file to read it: sender, recipients, date, the HTML and text versions, attachments to download and the raw headers. Remote images stay blocked until you allow them.
- Bulk domain age checker: https://simpleverifier.com/tools/bulk-domain-age-checker — Paste or upload a list of domains or emails and get each domain's creation date, age and registrar from RDAP, sorted, filtered by age and downloadable.
- Bulk domain expiry checker: https://simpleverifier.com/tools/bulk-domain-expiry-checker — Paste or upload a list of domains and get each one's expiry date, days left and registrar from RDAP, grouped into expired or in grace, under 30 days, 30–90 days and 90+ days.
- Available domain name generator: https://simpleverifier.com/tools/available-domain-name-generator — Enter up to three keywords and pick TLDs: name ideas from prefixes, suffixes and keyword joins are checked against each registry's RDAP server and DNS, likely-available first.
- Bulk WHOIS lookup: https://simpleverifier.com/tools/bulk-whois-lookup — Paste or upload domains and get registrar, created, updated and expiry dates, EPP status codes, nameservers and DNSSEC for each, from the registry's RDAP server, in one table.

### Free email marketing calculators (https://simpleverifier.com/tools/category/calculators)

- Verification cost calculator: https://simpleverifier.com/tools/verification-cost-calculator — Compare what verifying a list costs per 1,000 addresses across 34 vendors' published prices, including what re-verifying costs again.
- Cold email inbox calculator: https://simpleverifier.com/tools/cold-email-volume-calculator — Enter your daily target and per-inbox limit to get inboxes, domains, warm-up time and monthly volume, checked against Google's published limits.
- Bounce rate calculator: https://simpleverifier.com/tools/bounce-rate-calculator — Enter sent, bounced and complaints to get your rates, checked against each platform's published suspension line and Google's complaint threshold.
- Email verification cost by list size: https://simpleverifier.com/tools/email-verification-cost-calculator — Your list size and how often you check it, priced at SimpleVerifier and 8 other verifiers from their own pricing pages, lowest first, with a link to each.
- Sending limits calculator: https://simpleverifier.com/tools/email-sending-limits-calculator — Pick Gmail, Google Workspace, Microsoft 365 or Outlook.com to see every published daily and per-email limit, which one caps you, and how many inboxes your volume needs.
- Cold email ROI calculator: https://simpleverifier.com/tools/cold-email-roi-calculator — Turn prospects, reply, meeting and close rates, deal size and costs into monthly revenue, ROI and cost per meeting, plus the revenue lost to bounced addresses.
- Open rate calculator: https://simpleverifier.com/tools/open-rate-calculator — Open rate on delivered mail, click-through and click-to-open rates, and the rate without Apple's automatic opens, beside published averages with their sources.
- Email warm-up calculator: https://simpleverifier.com/tools/email-warmup-calculator — Enter inboxes, target volume and step size and get a week-by-week warm-up ramp per inbox and in total, with Google's no-doubling rule built in.
- Email list decay calculator: https://simpleverifier.com/tools/email-list-decay-calculator — Enter list size and age and pick a yearly rate (a BLS job-tenure model by role, or your own measured rate) to estimate how many contacts have gone stale.
- Spam complaint rate calculator: https://simpleverifier.com/tools/spam-complaint-rate-calculator — Complaints ÷ delivered, checked against Google's 0.1% target and the 0.3% limit in Google's and Yahoo's sender rules, with the complaint budget for your next send.
- SMS cost calculator: https://simpleverifier.com/tools/sms-cost-calculator — Recipients × messages × segments × per-segment price plus carrier fees, with the segment count from your actual text and the cost of unreachable numbers.
- Email A/B test calculator: https://simpleverifier.com/tools/ab-test-calculator — A two-proportion z-test on reply, open or click rates: p-value, lift and confidence interval, plus the sends each variant needs before a test is worth reading.
- List growth rate calculator: https://simpleverifier.com/tools/email-list-growth-rate-calculator — New subscribers minus unsubscribes, hard bounces, complaints and other removals, divided by the starting list size: the growth rate per period, compounded to a year, with the formula shown.
- Email marketing ROI calculator: https://simpleverifier.com/tools/email-marketing-roi-calculator — Revenue from email (known, or estimated from sends, bounce, click and conversion rates) against platform and other costs: ROI, return per $1, revenue and cost per subscriber.
- Cost per lead calculator: https://simpleverifier.com/tools/cost-per-lead-calculator — Enter spend and leads for each source, plus the share with invalid emails and duplicates, to get cost per lead, cost per valid lead and the spend lost on leads you can't reach.
- Call center staffing calculator (Erlang C): https://simpleverifier.com/tools/call-center-staffing-calculator — Enter calls per interval, average handle time and a service-level target to get the agents needed on the phones by Erlang C, the number to schedule after shrinkage, and the wait, ASA and occupancy at each staffing level.
- Best time to send email calculator: https://simpleverifier.com/tools/best-time-to-send-email — Paste recipient time zones, cities or US/Canada phone numbers, pick the local time mail should arrive, and get a batch schedule in your own time zone, with daylight saving handled.
- TAM calculator: https://simpleverifier.com/tools/tam-calculator — Enter the accounts that fit your customer profile, contacts per account and your daily send volume to get TAM, SAM and SOM, the reachable list size and its runway in months.
- Cold email bounce cost calculator: https://simpleverifier.com/tools/cold-email-bounce-cost-calculator — Estimated bounces a day and per inbox, the published 2% to 10% platform lines before and after verification, and the cost to verify the list at SimpleVerifier and other verifiers.

- https://simpleverifier.com/phone-format — country calling codes, international and trunk prefixes, number
  lengths and example numbers for 120 countries, read from Google's libphonenumber data.
  One page per country at /phone-format/<country>, e.g. https://simpleverifier.com/phone-format/germany.
- https://simpleverifier.com/area-code — every geographic North American area code in service, by state, province and
  country. One page per code at /area-code/<NNN>, e.g. https://simpleverifier.com/area-code/212: location, time zone,
  overlays, in-service date, dialling plan and the rate centers (US, from NANPA) or exchange areas (Canada,
  from CNAC) with the most prefixes. Never a carrier: an area code says where a number was issued.
- All tools: https://simpleverifier.com/tools

## Developer API

- https://simpleverifier.com/docs/api — email verification and phone validation API. GET or POST
  /api/v1/verify?email= with Authorization: Bearer sv_live_... returns
  {email, status: valid | risky | invalid, reason, mailbox_checked}. 120 calls a minute
  per key. Included in the paid plans, no per-call credits.
- Integration guides with complete code, each blocking only status invalid and failing open
  on timeouts: PHP https://simpleverifier.com/docs/api/php, Laravel https://simpleverifier.com/docs/api/laravel, WordPress https://simpleverifier.com/docs/api/wordpress, Python https://simpleverifier.com/docs/api/python, Django https://simpleverifier.com/docs/api/django, Flask https://simpleverifier.com/docs/api/flask, Node.js https://simpleverifier.com/docs/api/nodejs, Next.js https://simpleverifier.com/docs/api/nextjs, Express https://simpleverifier.com/docs/api/express, Ruby https://simpleverifier.com/docs/api/ruby, Rails https://simpleverifier.com/docs/api/rails, Go https://simpleverifier.com/docs/api/go, Java https://simpleverifier.com/docs/api/java, Spring Boot https://simpleverifier.com/docs/api/spring-boot, C# / .NET https://simpleverifier.com/docs/api/csharp, React form https://simpleverifier.com/docs/api/react-form
- https://simpleverifier.com/docs/mcp — remote MCP server for Claude, Cursor and other MCP clients, Streamable
  HTTP at https://simpleverifier.com/api/mcp with the same paid API key (Authorization: Bearer). Tools:
  verify_email, verify_emails_batch, get_job_status, get_job_results, validate_phone_format, check_mx, check_spf, check_dmarc, check_disposable_domain. Lists of up to 1000 addresses per job;
  validate_phone_format is a numbering-plan check only.
- https://simpleverifier.com/integrations/google-sheets — verify emails in Google Sheets with a copy-paste Apps Script
  (no Marketplace install; download: https://simpleverifier.com/integrations/simpleverifier-sheets.gs). Menu
  "SimpleVerifier > Verify selected emails" writes Status and Reason into the next two columns at up to
  100 checks a minute; formulas =SV_VERIFY(A2) and =SV_PHONE_FORMAT(A2, "US") (numbering-plan check only,
  never says a number is in service), cached 6 hours. Needs a paid plan's API key; the 100 free
  email checks are in the web app only.
- https://simpleverifier.com/integrations — all integrations: Google Sheets, Instantly, Smartlead, API, SDKs, MCP, export guides.

## Email verification for cold email

Verify a lead list between the lead source and the sequencer: export the CSV, run a mailbox check on
every row, import only the valid file, keep risky (usually catch-all) rows out of the main campaign and
drop invalid ones. The lowest published sending-platform bounce line is 2% (Brevo); HubSpot, Amazon SES
and Instantly's default auto-pause act at 5%. Google and Yahoo publish no bounce percentage (their 0.3%
line is spam complaints) but both tell senders to remove addresses that bounce.
Hub: https://simpleverifier.com/cold-email
Bounce cost calculator: https://simpleverifier.com/tools/cold-email-bounce-cost-calculator

Step-by-step workflows (export clicks for the source, import clicks and column mapping for the sequencer,
from each tool's own help centre, checked 20 October 2026):
- Apollo.io to Instantly: https://simpleverifier.com/cold-email/apollo-to-instantly
- Apollo.io to Smartlead: https://simpleverifier.com/cold-email/apollo-to-smartlead
- Apollo.io to lemlist: https://simpleverifier.com/cold-email/apollo-to-lemlist
- Clay to Instantly: https://simpleverifier.com/cold-email/clay-to-instantly
- Clay to Smartlead: https://simpleverifier.com/cold-email/clay-to-smartlead
- Clay to lemlist: https://simpleverifier.com/cold-email/clay-to-lemlist
- Sales Navigator to Smartlead: https://simpleverifier.com/cold-email/sales-navigator-to-smartlead
- ZoomInfo to Outreach: https://simpleverifier.com/cold-email/zoominfo-to-outreach
- Hunter to lemlist: https://simpleverifier.com/cold-email/hunter-to-lemlist
- Hunter to Instantly: https://simpleverifier.com/cold-email/hunter-to-instantly

## Use cases

How to verify a list for one specific job: the risks particular to it, a workflow
from source to send, and which results (valid, risky, invalid) to keep or drop.
Hub: https://simpleverifier.com/use-cases

- Email verification for cold email: https://simpleverifier.com/use-cases/cold-email
- Verifying B2B lead lists: https://simpleverifier.com/use-cases/b2b-lead-lists
- Email verification for ecommerce stores: https://simpleverifier.com/use-cases/ecommerce
- Email verification for SaaS signups: https://simpleverifier.com/use-cases/saas-signups
- Cleaning a newsletter subscriber list: https://simpleverifier.com/use-cases/newsletters
- Cleaning a recruiting email list: https://simpleverifier.com/use-cases/recruiting
- Email and phone verification for real estate: https://simpleverifier.com/use-cases/real-estate
- Email verification for marketing agencies: https://simpleverifier.com/use-cases/agencies
- Verifying event registration emails: https://simpleverifier.com/use-cases/event-registrations
- Email list cleaning for nonprofits: https://simpleverifier.com/use-cases/nonprofits
- Cleaning email addresses in your CRM: https://simpleverifier.com/use-cases/crm-cleanup
- Email verification for marketing automation: https://simpleverifier.com/use-cases/marketing-automation
- Verifying webinar leads: https://simpleverifier.com/use-cases/webinar-leads
- Verifying affiliate and lead-gen leads: https://simpleverifier.com/use-cases/affiliate-marketing
- Phone number validation for SMS marketing: https://simpleverifier.com/use-cases/sms-marketing
- Phone number validation for call centers: https://simpleverifier.com/use-cases/call-centers
- Real-time email verification for lead forms: https://simpleverifier.com/use-cases/lead-forms
- Verifying trade show and conference leads: https://simpleverifier.com/use-cases/trade-show-leads
- Verifying a purchased email list: https://simpleverifier.com/use-cases/purchased-lists
- Reactivating an old email list: https://simpleverifier.com/use-cases/old-list-reactivation

## Buyer guides

How to buy verification: bulk CSV, list cleaning, unlimited and subscription plans,
pay as you go, API pricing, and what a list of a given size costs across vendors.
Hub: https://simpleverifier.com/solutions

- Bulk email verifier for CSV lists: https://simpleverifier.com/solutions/bulk-email-verifier
- Email list cleaning service: https://simpleverifier.com/solutions/email-list-cleaning-service
- Unlimited email verification, and what the limit really is: https://simpleverifier.com/solutions/unlimited-email-verification
- Email verification subscription: https://simpleverifier.com/solutions/email-verification-subscription
- Pay-as-you-go email verification: https://simpleverifier.com/solutions/pay-as-you-go-email-verification
- Email verification API pricing without per-call fees: https://simpleverifier.com/solutions/email-verification-api
- Email and phone verification in one plan: https://simpleverifier.com/solutions/email-and-phone-verification
- What it costs to verify 10,000 emails: https://simpleverifier.com/solutions/verify-10000-emails
- What it costs to verify 50,000 emails: https://simpleverifier.com/solutions/verify-50000-emails
- What it costs to verify 100,000 emails: https://simpleverifier.com/solutions/verify-100000-emails

## Reference pages

- https://simpleverifier.com/glossary — 50 email verification, deliverability and phone validation terms defined
- https://simpleverifier.com/smtp — 63 SMTP reply codes explained, with causes and fixes
- https://simpleverifier.com/disposable — the 9,913-domain disposable blocklist, with a page on each major provider
- https://simpleverifier.com/domain/{domain} — live deliverability audit for any domain
- Mailbox provider and gateway pages (whether our checker can verify addresses there, from how it works by design and the provider's documented behaviour, plus a live MX/SPF/DMARC snapshot): https://simpleverifier.com/domain/gmail.com, https://simpleverifier.com/domain/outlook.com, https://simpleverifier.com/domain/hotmail.com, https://simpleverifier.com/domain/yahoo.com, https://simpleverifier.com/domain/icloud.com, https://simpleverifier.com/domain/aol.com, https://simpleverifier.com/domain/gmx.com, https://simpleverifier.com/domain/protonmail.com, https://simpleverifier.com/domain/fastmail.com, https://simpleverifier.com/domain/zoho.com, https://simpleverifier.com/domain/web.de, https://simpleverifier.com/domain/t-online.de, https://simpleverifier.com/domain/mail.ru, https://simpleverifier.com/domain/yandex.ru, https://simpleverifier.com/domain/live.com, https://simpleverifier.com/domain/msn.com, https://simpleverifier.com/domain/comcast.net, https://simpleverifier.com/domain/att.net, https://simpleverifier.com/domain/verizon.net, https://simpleverifier.com/domain/btinternet.com, https://simpleverifier.com/domain/orange.fr, https://simpleverifier.com/domain/free.fr, https://simpleverifier.com/domain/libero.it, https://simpleverifier.com/domain/qq.com, https://simpleverifier.com/domain/163.com, https://simpleverifier.com/domain/naver.com, https://simpleverifier.com/domain/daum.net, https://simpleverifier.com/domain/rediffmail.com, https://simpleverifier.com/domain/seznam.cz, https://simpleverifier.com/domain/wp.pl, https://simpleverifier.com/domain/yahoo.com.br, https://simpleverifier.com/domain/aspmx.l.google.com, https://simpleverifier.com/domain/mail.protection.outlook.com, https://simpleverifier.com/domain/pphosted.com, https://simpleverifier.com/domain/mimecast.com, https://simpleverifier.com/domain/barracudanetworks.com, https://simpleverifier.com/domain/iphmx.com
- https://simpleverifier.com/blog — articles on verification and deliverability

## Email templates

Short email templates written by SimpleVerifier, each with notes on when to use it, why it
works and what to check before sending. No reply-rate claims are made for any of
them. Placeholders are written as {{name}}. Hub: https://simpleverifier.com/templates

### Cold outreach: https://simpleverifier.com/templates/cold-outreach

- Cold email after a conference or event (73 words): https://simpleverifier.com/templates/after-event-cold-email
- Cold email from a SaaS founder to an operations lead (80 words): https://simpleverifier.com/templates/saas-founder-to-ops-lead
- Cold email from an agency to a local business owner (83 words): https://simpleverifier.com/templates/agency-to-local-business
- Partnership pitch to a complementary company (101 words): https://simpleverifier.com/templates/partnership-pitch-integration
- Recruiter email to a passive candidate (79 words): https://simpleverifier.com/templates/recruiter-to-passive-candidate

### Follow-up: https://simpleverifier.com/templates/follow-up

- Follow-up after a missed meeting (64 words): https://simpleverifier.com/templates/follow-up-after-no-show
- Follow-up after sending a proposal (74 words): https://simpleverifier.com/templates/follow-up-after-proposal
- Follow-up email after a meeting (67 words): https://simpleverifier.com/templates/follow-up-after-meeting
- Follow-up email that adds a useful resource (55 words): https://simpleverifier.com/templates/follow-up-with-useful-resource
- Follow-up email with a new angle (76 words): https://simpleverifier.com/templates/follow-up-new-angle

### Breakup: https://simpleverifier.com/templates/breakup

- Breakup email asking for the right person (65 words): https://simpleverifier.com/templates/breakup-right-person-check
- Breakup email for a stalled deal (78 words): https://simpleverifier.com/templates/breakup-stalled-deal
- Breakup email offering to check back later (56 words): https://simpleverifier.com/templates/breakup-check-back-later
- Breakup email that closes the loop (59 words): https://simpleverifier.com/templates/breakup-closing-the-loop

### Meeting request: https://simpleverifier.com/templates/meeting-request

- Customer research interview request (72 words): https://simpleverifier.com/templates/meeting-request-customer-interview
- Demo offer to a trial user (75 words): https://simpleverifier.com/templates/meeting-request-trial-user-demo
- Meeting request before a conference (60 words): https://simpleverifier.com/templates/meeting-request-at-event
- Meeting request with a clear agenda (66 words): https://simpleverifier.com/templates/meeting-request-with-agenda

### Re-engagement: https://simpleverifier.com/templates/re-engagement

- Email to revive an old lead (45 words): https://simpleverifier.com/templates/cold-lead-revival
- Nudge for a user who signed up but never started (58 words): https://simpleverifier.com/templates/inactive-user-nudge
- Re-engagement email after a trial ends (72 words): https://simpleverifier.com/templates/post-trial-re-engagement
- Win-back email to a cancelled customer (60 words): https://simpleverifier.com/templates/lapsed-customer-win-back

### List cleaning and permission pass: https://simpleverifier.com/templates/list-cleaning

- Email offering subscribers fewer emails (46 words): https://simpleverifier.com/templates/preference-centre-frequency-down
- Permission pass email before a list cleanup (68 words): https://simpleverifier.com/templates/permission-pass-before-cleanup
- Reconfirmation email after a list migration (54 words): https://simpleverifier.com/templates/reconfirm-after-platform-move
- Sunset email before suppressing inactive subscribers (61 words): https://simpleverifier.com/templates/sunset-email-before-suppression

### Introductions and referrals: https://simpleverifier.com/templates/introductions-referrals

- Asking a contact for an introduction (86 words): https://simpleverifier.com/templates/ask-for-an-introduction
- Asking a happy customer for a referral (73 words): https://simpleverifier.com/templates/ask-customer-for-referral
- Cold email after a referral (59 words): https://simpleverifier.com/templates/referral-follow-up
- Double opt-in introduction email (70 words): https://simpleverifier.com/templates/double-opt-in-introduction

## Research and data

Original measurement studies by SimpleVerifier. Each states its method and
limitations and publishes its raw data as CSV under CC BY 4.0
(https://creativecommons.org/licenses/by/4.0/): free to reuse with a link back
to the study. Hub: https://simpleverifier.com/research

- Common SPF Mistakes: What We Found in 696 Real Company Domains: https://simpleverifier.com/blog/spf-record-mistakes-study
  Headline finding: 16 of 673 published SPF records needed more than 10 lookups and therefore fail with permerror.
  Data: https://simpleverifier.com/data/studies/spf-record-mistakes-study.csv (CSV, 696 rows, measured 2026-10-02)
- MTA-STS and TLS-RPT Adoption Among 1,359 Major Domains (2026): https://simpleverifier.com/blog/mta-sts-adoption-study
  Headline finding: 58 of 1,359 major domains (4.3%) publish MTA-STS; only 28 enforce a working policy.
  Data: https://simpleverifier.com/data/studies/mta-sts-adoption-study.csv (CSV, 1,396 rows, measured 2026-10-02)
- Free Email Provider Domains: A Reference List of 79, Checked: https://simpleverifier.com/blog/free-email-providers-list
  Headline finding: 79 consumer email domains, all with live MX records on 2 October 2026, none on our 8,740-domain disposable list.
  Data: https://simpleverifier.com/data/studies/free-email-providers-list.csv (CSV, 79 rows, measured 2026-10-02)
- We Read 19 Email Verifiers' Homepage Claims. Here's What Holds Up: https://simpleverifier.com/blog/email-verifier-claims-audit
  Headline finding: Eleven of the 19 vendors publish an accuracy figure, and none of them can be checked by a reader.
  Data: https://simpleverifier.com/data/studies/email-verifier-claims-audit.csv (CSV, 134 rows, measured 2026-10-01/2026-10-02)
- Email Verification Pricing Index, October 2026: 19 Vendors: https://simpleverifier.com/blog/email-verification-pricing-index
  Headline finding: Verifying 10,000 email addresses costs between $11.90 and $129 at published prices; verifying 1 million costs between $349 and $3,199.
  Data: https://simpleverifier.com/data/studies/email-verification-pricing-index.csv (CSV, 32 rows, measured 2026-10-01/2026-10-02)
- Google Workspace vs Microsoft 365: MX Records of 696 Companies: https://simpleverifier.com/blog/email-provider-market-share-b2b
  Headline finding: 93.5% of 200 SaaS companies receive mail directly at Google Workspace.
  Data: https://simpleverifier.com/data/studies/email-provider-market-share-b2b.csv (CSV, 496 rows, measured 2026-10-02)
- DMARC Adoption Among 200 SaaS Companies (October 2026 Data): https://simpleverifier.com/blog/dmarc-adoption-saas-study
  Headline finding: 97% of 200 SaaS companies publish a valid DMARC record, but only 63.5% fully enforce it.
  Data: https://simpleverifier.com/data/studies/dmarc-adoption-saas-study.csv (CSV, 696 rows, measured 2026-10-02)
- What 8,740 Disposable Email Domains Have in Common: A Data Study: https://simpleverifier.com/blog/disposable-email-domains-analysis
  Headline finding: Only 4.9% of the 8,740 domains contain an obvious throwaway word like "temp" or "trash".
  Data: https://simpleverifier.com/data/studies/disposable-email-domains-analysis.csv (CSV, 8,740 rows, measured 2026-10-02)
- How Many Brands Actually Use BIMI? A Check of 1,359 Domains: https://simpleverifier.com/blog/bimi-adoption-study
  Headline finding: 16.9% of S&P 500 companies, 11.5% of SaaS companies and 24.0% of top-site mail domains publish BIMI.
  Data: https://simpleverifier.com/data/studies/bimi-adoption-study.csv (CSV, 1,396 rows, measured 2026-10-02)

## Guides

### Choosing a verifier: comparisons and pricing

- Best Phone Number Validation Tools in 2026, Compared Honestly: https://simpleverifier.com/blog/best-phone-number-validation-tools
- Twilio Lookup Alternatives for Line Type and Carrier Checks: https://simpleverifier.com/blog/twilio-lookup-alternatives
- Numverify Alternatives: Phone Validation Compared on Price and What You Get: https://simpleverifier.com/blog/numverify-alternatives
- How to Choose an Email Verification Service: 12 Questions: https://simpleverifier.com/blog/how-to-choose-email-verifier
- Email Verification Credits: What You Pay For and When They Expire: https://simpleverifier.com/blog/email-verification-credits-explained
- How to Bench Test Email Verifiers Fairly, Side by Side: https://simpleverifier.com/blog/bench-test-email-verifiers
- Email Verifier Accuracy: What '99% Accurate' Actually Means: https://simpleverifier.com/blog/email-verification-accuracy
- Voila Norbert Alternatives: Rollover and Pay-on-Success Finders: https://simpleverifier.com/blog/voila-norbert-alternatives
- Verifalia Alternatives Compared: Price, Depth and Wait Times: https://simpleverifier.com/blog/verifalia-alternatives
- Snov.io Alternatives for Finding and Verifying Email Addresses: https://simpleverifier.com/blog/snov-io-alternatives
- Reoon Email Verifier Alternatives, and When You Need One: https://simpleverifier.com/blog/reoon-email-verifier-alternatives
- MillionVerifier Alternatives Compared on Price and File Limits: https://simpleverifier.com/blog/millionverifier-alternatives
- Mailgun Email Validation Alternatives for Developers in 2026: https://simpleverifier.com/blog/mailgun-email-validation-alternatives
- Findymail Alternatives: Cheaper Entry, Bigger Trials, Phone Data: https://simpleverifier.com/blog/findymail-alternatives
- Emailable Alternatives Worth Considering, Compared Neutrally: https://simpleverifier.com/blog/emailable-alternatives
- The Cheapest Email Verification Services, Priced Per 1,000: https://simpleverifier.com/blog/cheapest-email-verification-service
- Free Email Verifiers: What the Free Tiers Actually Give You: https://simpleverifier.com/blog/best-free-email-verifier
- Verifying a Million-Row List: Which Tools Handle It, and the Cost: https://simpleverifier.com/blog/best-email-verifier-for-large-lists
- Best Email Verification Tools in 2026, Compared on Real Pricing: https://simpleverifier.com/blog/best-email-verification-tools
- Best Email Finder Tools in 2026, Compared on What You Pay For: https://simpleverifier.com/blog/best-email-finder-tools
- Apollo.io Alternatives for Prospecting and Email Data in 2026: https://simpleverifier.com/blog/apollo-io-alternatives

### Email verification, bounces and list hygiene

- Switching Email Platforms? Clean and Verify the List First: https://simpleverifier.com/blog/verify-list-before-switching-esp
- How to Run a Re-Engagement Email Campaign That Protects Inbox Placement: https://simpleverifier.com/blog/re-engagement-campaign-guide
- How Long Does Bulk Email Verification Take, and Why It Varies: https://simpleverifier.com/blog/how-long-bulk-email-verification-takes
- B2B vs B2C Email Verification: Same Check, Different Problems: https://simpleverifier.com/blog/b2b-vs-b2c-email-verification
- Why SMTP Email Verification Gets It Wrong: False Valids and False Invalids: https://simpleverifier.com/blog/smtp-verification-false-positives
- Null MX Records (RFC 7505): How to Say a Domain Takes No Mail: https://simpleverifier.com/blog/null-mx-record
- How to Calculate Email Bounce Rate From Your Own Send Data: https://simpleverifier.com/blog/calculate-email-bounce-rate
- How to Verify Email Addresses in Airtable: Formulas to Scripts: https://simpleverifier.com/blog/verify-emails-in-airtable
- Cleaning a Constant Contact List: Bounces, Suspended and Role Addresses: https://simpleverifier.com/blog/clean-constant-contact-list
- How to Verify Email Addresses in Salesforce Without Breaking Records: https://simpleverifier.com/blog/verify-emails-in-salesforce
- How to Verify Email Addresses in Pipedrive and Update Contacts: https://simpleverifier.com/blog/verify-emails-in-pipedrive
- How to Clean a Klaviyo List: Suppress, Verify and Sunset: https://simpleverifier.com/blog/clean-klaviyo-list
- How to Clean a Brevo Contact List Without Losing Your Account: https://simpleverifier.com/blog/clean-brevo-list
- How to Clean an ActiveCampaign List Without Losing Good Contacts: https://simpleverifier.com/blog/clean-activecampaign-list
- Is Email Verification Worth It? Working Out the ROI Yourself: https://simpleverifier.com/blog/email-verification-roi
- How to Write a Sunset Policy for Inactive Email Subscribers: https://simpleverifier.com/blog/sunset-policy-inactive-subscribers
- How Fast B2B Contact Data Decays, and What to Do About It: https://simpleverifier.com/blog/b2b-contact-data-decay
- What Happens When You Email an Address That Doesn't Exist: https://simpleverifier.com/blog/what-happens-when-you-email-invalid-address
- Verifying Emails Behind Proofpoint, Mimecast and Barracuda: https://simpleverifier.com/blog/verify-emails-behind-security-gateways
- How to Verify an Email List for Free (What Free Actually Covers): https://simpleverifier.com/blog/verify-email-list-free
- Verified Emails Still Bouncing? How to Find the Real Cause: https://simpleverifier.com/blog/verified-emails-still-bouncing
- Gmail Bounce Codes: How to Find Out Why Gmail Rejected Your Email: https://simpleverifier.com/blog/gmail-bounce-codes
- Build or Buy Email Verification? What an In-House Checker Takes: https://simpleverifier.com/blog/build-vs-buy-email-verification
- Double Opt-In vs Email Verification: Which Do You Need?: https://simpleverifier.com/blog/double-opt-in-vs-verification
- Should You Send to info@ and sales@? Role Addresses Explained: https://simpleverifier.com/blog/role-based-email-addresses
- Why Yahoo Email Addresses Are Hard to Verify (and What to Do): https://simpleverifier.com/blog/verify-yahoo-email-address
- Verifying Outlook and Hotmail Addresses: What Actually Works: https://simpleverifier.com/blog/verify-outlook-hotmail-address
- Should You Email Catch-All Addresses? A Decision Framework: https://simpleverifier.com/blog/send-to-catch-all-emails
- How Often Should You Re-Verify Your Email List? A Cadence Guide: https://simpleverifier.com/blog/how-often-to-verify-email-list
- Syntax Check vs MX Check vs SMTP Verification: What Each Catches: https://simpleverifier.com/blog/syntax-check-vs-smtp-verification
- How to Remove Invalid and Duplicate Emails From a CSV File: https://simpleverifier.com/blog/remove-invalid-emails-from-csv
- How to Verify Email Addresses in Google Sheets: Tested Formulas: https://simpleverifier.com/blog/verify-emails-in-google-sheets
- How to Clean and Verify an Email List in Excel, Step by Step: https://simpleverifier.com/blog/verify-emails-in-excel
- Should You Re-Verify an Apollo Export Before Sending It?: https://simpleverifier.com/blog/verify-apollo-export
- How to Clean Your Mailchimp List Before Your Next Campaign: https://simpleverifier.com/blog/clean-mailchimp-list
- Cleaning Bounced and Invalid Contacts in HubSpot, Step by Step: https://simpleverifier.com/blog/clean-hubspot-contacts
- How to Check if a Gmail Address Exists (Without Emailing It): https://simpleverifier.com/blog/verify-gmail-address-exists
- What Gmail, Outlook and Yahoo Say When a Mailbox Doesn't Exist: https://simpleverifier.com/blog/mailbox-provider-bounce-messages
- How to Clean an Email List: A Step-by-Step Process in Order: https://simpleverifier.com/blog/how-to-clean-an-email-list
- Email Verification Results: Valid, Invalid, Risky and Unknown: https://simpleverifier.com/blog/email-verification-statuses-explained
- Bounce Rate Limits by Platform: When Each ESP Takes Action: https://simpleverifier.com/blog/bounce-rate-thresholds-by-platform
- Most Cloud Providers Block Outbound Port 25 — And It Breaks Email Verification: https://simpleverifier.com/blog/cloud-providers-block-port-25
- How to Check If an Email Address Is Valid Without Sending Anything: https://simpleverifier.com/blog/check-if-email-is-valid-without-sending
- What Is a Catch-All Domain, and Why Can't Verifiers Check It?: https://simpleverifier.com/blog/what-is-a-catch-all-domain
- How to Tell If Your Email Verifier Is Lying to You: https://simpleverifier.com/blog/how-to-tell-if-your-email-verifier-is-lying

### Deliverability

- Spamhaus Lists Explained: SBL, CSS, XBL, PBL, DBL and ZEN: https://simpleverifier.com/blog/spamhaus-listings-explained
- What Is Sender Score? How Validity Rates Your Sending IP: https://simpleverifier.com/blog/sender-score-explained
- Gmail Promotions Tab: Why Mail Lands There and What Helps: https://simpleverifier.com/blog/gmail-promotions-tab
- Reverse DNS (PTR) Records for Email: What They Are and How to Check: https://simpleverifier.com/blog/reverse-dns-ptr-record-email
- Inbox Placement Seed Tests: How to Run One and Read It Honestly: https://simpleverifier.com/blog/inbox-placement-seed-test
- Do Spam Trigger Words Still Matter? What Filters Actually Score: https://simpleverifier.com/blog/spam-trigger-words-myth
- Should You Buy an Email List? The Deliverability Answer: https://simpleverifier.com/blog/should-you-buy-email-lists
- Twilio SMS Error Codes 30003 to 30008: What They Mean for Your List: https://simpleverifier.com/blog/twilio-sms-error-codes
- Handling Soft Bounces: When to Retry and When to Suppress: https://simpleverifier.com/blog/soft-bounce-handling
- Shared or Dedicated IP for Email? A Volume-Based Answer: https://simpleverifier.com/blog/shared-vs-dedicated-ip
- How Spam Traps Get Onto Your List, and How to Keep Them Off: https://simpleverifier.com/blog/how-spam-traps-get-on-your-list
- How to Read Email Headers to Debug Deliverability Problems: https://simpleverifier.com/blog/email-headers-explained
- Email Deliverability Checklist: 25 Checks Before You Send: https://simpleverifier.com/blog/email-deliverability-checklist
- Why Your Emails Go to Spam in Gmail, and How to Diagnose It: https://simpleverifier.com/blog/why-emails-go-to-spam-gmail
- Recovering a Damaged Sender Reputation: A Realistic 30-Day Plan: https://simpleverifier.com/blog/sender-reputation-recovery
- How to Get Removed From an Email Blacklist (Spamhaus and More): https://simpleverifier.com/blog/how-to-get-off-a-blacklist
- Reading Google Postmaster Tools: Spam Rate and Compliance: https://simpleverifier.com/blog/google-postmaster-tools-guide
- Why Emails Land in Outlook's Junk Folder, and How to Find Out: https://simpleverifier.com/blog/emails-going-to-junk-outlook
- One-Click Unsubscribe (RFC 8058): How to Implement It Properly: https://simpleverifier.com/blog/one-click-unsubscribe
- An Email Warm-Up Schedule for New Domains and New Inboxes: https://simpleverifier.com/blog/email-warmup-schedule
- Microsoft Outlook's Bulk Sender Requirements, Read Closely: https://simpleverifier.com/blog/microsoft-outlook-sender-requirements
- Gmail and Yahoo Bulk Sender Requirements, Explained Side by Side: https://simpleverifier.com/blog/gmail-yahoo-bulk-sender-requirements
- Why Cold Emails Bounce, and How to Fix It Before Your Next Send: https://simpleverifier.com/blog/why-cold-emails-bounce

### Email authentication: SPF, DKIM, DMARC and more

- ARC Email Authentication: How It Rescues Forwarded Mail: https://simpleverifier.com/blog/arc-email-authentication
- DKIM Key Length and Rotation: 1024 vs 2048-bit, Measured: https://simpleverifier.com/blog/dkim-2048-bit-key-rotation
- BIMI Setup Guide: What It Needs and Whether It's Worth It: https://simpleverifier.com/blog/bimi-setup-guide
- Fixing 'SPF PermError: Too Many DNS Lookups', Worked Example: https://simpleverifier.com/blog/spf-too-many-dns-lookups
- Moving DMARC From p=none to p=reject Without Breaking Mail: https://simpleverifier.com/blog/dmarc-none-to-reject

### Cold email and outreach

- Custom Tracking Domains for Cold Email: Setup and Real Risks: https://simpleverifier.com/blog/custom-tracking-domain-cold-email
- How Many Cold Emails Per Day Per Inbox? Limits vs Safe Volume: https://simpleverifier.com/blog/cold-emails-per-day-per-inbox
- How Many Follow-Ups Should a Cold Email Sequence Have?: https://simpleverifier.com/blog/cold-email-follow-up-sequence
- Cold Email Reply Rate Benchmarks, and Why Most Are Misleading: https://simpleverifier.com/blog/cold-email-reply-rate-benchmarks
- Cold Email to Local Service Businesses: Finding Owner Emails: https://simpleverifier.com/blog/cold-email-local-service-businesses
- Setting Up Secondary Domains for Cold Email: What It Protects: https://simpleverifier.com/blog/cold-email-domain-setup
- Preparing a Lead List for Smartlead Without Burning Inboxes: https://simpleverifier.com/blog/smartlead-list-verification
- Lowering Bounce Rate in lemlist Campaigns: A Practical Guide: https://simpleverifier.com/blog/lemlist-bounce-rate
- How to Keep Your Instantly Bounce Rate Under Control in 2026: https://simpleverifier.com/blog/instantly-bounce-rate

### Finding emails and lead generation

- Lead Validation: Checking Email, Phone and Company Data Before Outreach: https://simpleverifier.com/blog/lead-validation
- How to Check a Lead List's Quality Before You Pay For It: https://simpleverifier.com/blog/lead-list-quality-check
- How to Find a CEO's Email Address, and When It Can't Be Verified: https://simpleverifier.com/blog/how-to-find-ceo-email-address
- How to Build an Email List of Local Businesses: A Measured Funnel: https://simpleverifier.com/blog/find-emails-for-local-businesses
- How to Find an Email From a LinkedIn Profile, Legitimately: https://simpleverifier.com/blog/find-email-from-linkedin-profile
- Company Email Formats: The Patterns That Cover Most Businesses: https://simpleverifier.com/blog/email-address-patterns
- How to Find Someone's Business Email Address: 7 Methods That Work: https://simpleverifier.com/blog/how-to-find-someones-business-email

### Developers, signup forms and automation

- Verify Emails With Make: HTTP Module, Caching and Retries: https://simpleverifier.com/blog/verify-emails-with-make
- How to Validate an Email Address in PHP: filter_var, DNS and SMTP: https://simpleverifier.com/blog/validate-email-php
- Email Validation in a Node.js Backend: Zod, Express and Bulk Lists: https://simpleverifier.com/blog/validate-email-nodejs
- Phone Number Validation API: Library, Lookup API or Bulk Upload?: https://simpleverifier.com/blog/phone-number-validation-api
- Verify Emails and Phone Numbers in HighLevel (GoHighLevel) Workflows: https://simpleverifier.com/blog/verify-leads-gohighlevel
- Google Forms Email Verification: Check Every Response Automatically: https://simpleverifier.com/blog/verify-google-forms-emails
- How to Verify Emails in Zoho CRM With a Deluge Function and Workflow Rule: https://simpleverifier.com/blog/verify-emails-zoho-crm
- Webflow Form Email Verification: Stop Fake and Mistyped Addresses: https://simpleverifier.com/blog/verify-emails-webflow-forms
- Block Invalid and Disposable Signups in Supabase Auth With a Hook: https://simpleverifier.com/blog/verify-emails-supabase-auth
- Verify Emails in Salesforce With a Flow and HTTP Callout, No Apex: https://simpleverifier.com/blog/verify-emails-salesforce-flow
- How to Verify Emails With Power Automate: HTTP Action, Parse JSON, Retries: https://simpleverifier.com/blog/verify-emails-power-automate
- How to Verify Emails in Bubble.io With the API Connector: https://simpleverifier.com/blog/verify-emails-bubble
- How to Verify Emails in n8n: HTTP Request Node, Batching and Retries: https://simpleverifier.com/blog/verify-emails-n8n
- How to Verify Emails in Clay With an HTTP API Column: https://simpleverifier.com/blog/verify-emails-in-clay
- Verify New HubSpot Contacts Automatically With a Workflow: https://simpleverifier.com/blog/verify-emails-hubspot-workflow
- Automatically Verify New Leads With Zapier, Make or a Webhook: https://simpleverifier.com/blog/verify-leads-automatically-zapier
- Validating Email Addresses in Python: Syntax, MX and SMTP: https://simpleverifier.com/blog/validate-email-python
- Validating Email Addresses in JavaScript and Node.js, With Code: https://simpleverifier.com/blog/validate-email-javascript
- Plus Addressing, Gmail Dots and Free-Trial Abuse: The Rules: https://simpleverifier.com/blog/plus-addressing-trial-abuse
- Catching Email Typos at Signup: gmial.com, hotmial.com and More: https://simpleverifier.com/blog/email-typo-correction
- How to Stop Fake Signups Without Hurting Real Users (With Code): https://simpleverifier.com/blog/stop-fake-signups
- Email Verification APIs Compared: Auth, Timeouts, Rate Limits: https://simpleverifier.com/blog/email-verification-api-comparison
- Why Email Validation Regex Fails, and What to Use Instead: https://simpleverifier.com/blog/email-validation-regex
- How to Tell a Business Email From a Personal One (and Is This Domain Free?): https://simpleverifier.com/blog/business-email-vs-personal-email
- How to Block Disposable Emails on Your Signup Form, Tested: https://simpleverifier.com/blog/block-disposable-emails-signup
- Real-Time Email Verification on Signup Forms: A Latency Guide: https://simpleverifier.com/blog/real-time-email-verification-api

### Guides by industry and team

- Phone Number Validation for Cold Calling: Clean the List Before You Dial: https://simpleverifier.com/blog/phone-number-validation-for-cold-calling
- Cleaning a Trade Show Attendee List Before Follow-Up Emails: https://simpleverifier.com/blog/event-attendee-list-cleaning
- Email Verification for SDR Teams: A Workflow That Scales: https://simpleverifier.com/blog/email-verification-sales-teams
- Email Verification for Ecommerce Stores: Checkout to Klaviyo: https://simpleverifier.com/blog/email-verification-ecommerce
- Verifying Candidate and Client Emails: A Guide for Recruiters: https://simpleverifier.com/blog/email-verification-recruiters
- Email List Hygiene for Real Estate Agents: Leads and Sphere: https://simpleverifier.com/blog/email-verification-real-estate
- Email Verification for Agencies Managing Client Email Lists: https://simpleverifier.com/blog/email-verification-marketing-agencies
- Cleaning a Nonprofit Donor Email List Without Losing Donors: https://simpleverifier.com/blog/email-list-cleaning-nonprofits

### Compliance

- GDPR and B2B Cold Email: Legitimate Interest Explained (UK/EU): https://simpleverifier.com/blog/gdpr-b2b-cold-email
- CASL and Cold Email to Canada: Consent, Exemptions, Proof: https://simpleverifier.com/blog/casl-cold-email-canada
- CAN-SPAM and Cold Email: What the Law Actually Requires: https://simpleverifier.com/blog/can-spam-cold-email
- How to Scrub a Call List Against the National Do Not Call Registry: https://simpleverifier.com/blog/scrub-list-do-not-call-registry
- Is Email Verification GDPR-Compliant? What the Rules Say: https://simpleverifier.com/blog/email-verification-gdpr
- How to Build a Cold Email Suppression List That Never Leaks: https://simpleverifier.com/blog/cold-email-suppression-list
- Is It Legal to Collect Business Email Addresses? US, UK and EU: https://simpleverifier.com/blog/is-it-legal-to-collect-business-emails

### Other guides

- Accept-All vs Unknown: Two Results That Need Different Handling: https://simpleverifier.com/blog/accept-all-vs-unknown-results
- Yahoo Email Domains: ymail.com, rocketmail.com, AOL and the ISPs on Yahoo: https://simpleverifier.com/blog/yahoo-email-domains
- How to Validate Phone Numbers in Google Sheets (Formulas + Limits): https://simpleverifier.com/blog/validate-phone-numbers-in-google-sheets
- US Phone Number Format: Rules, Examples and How to Validate One: https://simpleverifier.com/blog/us-phone-number-format
- How to Check if a Number Is on WhatsApp (What Works, What Doesn't): https://simpleverifier.com/blog/check-if-number-is-on-whatsapp
- How to Validate Phone Numbers Before an SMS Campaign: https://simpleverifier.com/blog/validate-phone-numbers-for-sms
- Toll-Free Numbers: Every Prefix, and How to Spot Them in a List: https://simpleverifier.com/blog/toll-free-numbers
- Hotmail, Outlook, Live and MSN Email Domains: One Service, Many Addresses: https://simpleverifier.com/blog/hotmail-outlook-live-msn-email-domains
- How to Remove Duplicate Phone Numbers (Normalise First, Then Dedupe): https://simpleverifier.com/blog/remove-duplicate-phone-numbers
- How to Clean Phone Numbers in a CSV (Format, Dedupe, Remove Invalid): https://simpleverifier.com/blog/clean-phone-numbers-in-csv
- Mobile vs Landline Lookup: How to Tell What Kind of Number It Is: https://simpleverifier.com/blog/mobile-vs-landline-lookup
- How to Format Phone Numbers in Excel (Including E.164): https://simpleverifier.com/blog/format-phone-numbers-in-excel
- How to Validate Phone Numbers in Excel (Formulas That Work): https://simpleverifier.com/blog/validate-phone-numbers-in-excel
- Is This a Cell Phone Number? 4 Ways to Check: https://simpleverifier.com/blog/is-this-a-cell-phone-number
- E.164 Phone Number Format: What It Is, With Examples by Country: https://simpleverifier.com/blog/e164-phone-number-format
- Phone Carrier Lookup: How to Find the Carrier of Any Number: https://simpleverifier.com/blog/phone-carrier-lookup
- googlemail.com vs gmail.com: Same Inbox, and What It Means for Your List: https://simpleverifier.com/blog/googlemail-com-vs-gmail-com
- Free Phone Number Validator: What a Free Check Can (and Can't) Tell You: https://simpleverifier.com/blog/free-phone-number-validator
- How to Check if a Phone Number Is Valid (4 Levels, Free to Paid): https://simpleverifier.com/blog/check-if-phone-number-is-valid
- How to Check if a Phone Number Is VoIP (and Why It Matters): https://simpleverifier.com/blog/check-if-number-is-voip
- Bulk Phone Number Validation: Check a Whole List in One Upload: https://simpleverifier.com/blog/bulk-phone-number-validation

## Other languages

The homepage, pricing and selected articles are translated. The facts and the
price are identical in every language; the price is always $29.99 USD.
Tools, comparisons and reference pages are English only.

- Português (Brasil) (pt-BR): https://simpleverifier.com/pt-br, pricing: https://simpleverifier.com/pt-br/pricing, blog (20 translated articles): https://simpleverifier.com/pt-br/blog
- Español (es): https://simpleverifier.com/es, pricing: https://simpleverifier.com/es/pricing, blog (20 translated articles): https://simpleverifier.com/es/blog
- Deutsch (de): https://simpleverifier.com/de, pricing: https://simpleverifier.com/de/pricing, blog (20 translated articles): https://simpleverifier.com/de/blog
- Français (fr): https://simpleverifier.com/fr, pricing: https://simpleverifier.com/fr/pricing, blog (20 translated articles): https://simpleverifier.com/fr/blog

## Contact

Support: support@simpleverifier.com. About SimpleVerifier and how the blog is
written: https://simpleverifier.com/about
Terms of Service: https://simpleverifier.com/terms. Privacy Policy: https://simpleverifier.com/privacy

Last updated: 2026-10-21