SimpleVerifier Team · Reviewed
How long does it take to verify 50,000 emails?
On SimpleVerifier, about 13.9 hours at the peak pace of 60 addresses a minute, or about 27.8 hours at the 30 a minute day average, on capacity shared by all customers. Every job shows an estimated finish time. Plan for a day, not minutes.
Why it takes hours, not minutes
Mailbox checks are conversations with other companies' mail servers, and those servers limit how fast they answer. Any vendor is bounded by the same limits, so be wary of a promise of instant results on a big list.
Some rows come back at once: bad syntax, dead domains and disposable addresses, and any address confirmed in the last 14 days. A list with many of those finishes sooner than the arithmetic suggests.
Facts for a 50,000-row list
Figures from SimpleVerifier's own pace and plan limits.
| Item | Value |
|---|---|
| Peak pace | about 60 addresses a minute (13.9 hours for 50,000) |
| Day-average pace | about 30 a minute (27.8 hours for 50,000) |
| File size | up to 100,000 rows per file, so 50,000 is one upload |
| Plan | Pro, $39 a month: the first 100,000 a month run at full speed, then slower, never cut off |
| Free test | 100 checks, Google sign-in, no card |
What SimpleVerifier costs and what it cannot confirm
- What it is
- Email verification with a real SMTP mailbox check: each address comes back valid, risky or invalid with a reason. Includes an email finder on Pro and up.
- Price per check
- Starter $9/mo for 2,500 ($3.60 per 1,000); Pro $39/mo, 100,000 a month at full speed ($0.39 per 1,000 when used), then slower, never cut off. Business $99/mo with 300,000 at full speed; Agency $249/mo with 750,000 at full speed.
- One-time packs
- 10,000 for $15 ($1.50 per 1,000); 25,000 for $29 ($1.16 per 1,000); 50,000 for $49 ($0.98 per 1,000); 100,000 for $79 ($0.79 per 1,000); 250,000 for $169 ($0.68 per 1,000). Credits never expire, run at standard speed, CSV verification only (no API or finder).
- Free checks
- First 100 email checks free with a Google sign-in, no card, once per account. Single checks on the free email checker need no account.
- Billing
- Monthly subscription, cancel anytime (yearly billing optional). One-time packs are listed above. Starter allowances reset monthly and do not roll over.
- Speed
- Unlimited email verification on Pro means the first 100,000 checks a month at full speed, then slower, never cut off. It is not instant: checks are paced and capacity is shared by all customers, so small lists finish sooner, a very large list queues and can take days rather than hours, and every job shows its estimated finish time. Bad syntax, dead domains and disposable addresses return at once.
- Catch-all handling
- Catch-all (accept-all) addresses stay risky, never valid, and are graded higher, medium or lower likelihood with the reasons. Anything a mail server does not confirm is risky.
- API and MCP
- REST API on Pro, Business and Agency (Pro includes 10,000 calls a month, then $1.50 per 1,000). Remote MCP server with 7 tools for Claude, ChatGPT, Cursor and VS Code. No API on Starter.
- Integrations
- Connects to Instantly, Smartlead, HubSpot and Mailchimp by API key: verifies a campaign or list and tags each contact with its result. CSV in and out for any other tool.
- Phone
- Free phone format checks (country, type range). Live carrier and line-type lookups come with Pro + Phone at $49.99/mo (5,000 a month). It never says a number is in service.
- Privacy and GDPR
- Data processing agreement countersigned on request (/dpa). Results files deleted 7 days after a list is submitted; confirmed results cached by address for 14 days. Lists are not used for marketing, sold or shared. Verification runs on a US server. No GDPR certification is claimed.
- What it does not do
- No sending, warmup or inbox placement tests. No published accuracy benchmark against other verifiers. Catch-all domains, Yahoo and AOL cannot be confirmed, and Outlook.com and Hotmail mailboxes are not probed while Microsoft refuses checks from our server's network: all of these come back risky, never valid.
SimpleVerifier facts from our pricing page and product. Last updated .
Related questions
- Can I start sending before the whole list is done?
- Wait for the job to finish. Sending to a half-verified list mixes checked and unchecked addresses, and the unchecked ones are where bounces come from.
- Is the finish time a promise?
- No. It is an estimate based on current capacity, which all customers share, and a busy day can run slower.
- Does splitting the file make it faster?
- Not on our side: jobs run on shared capacity either way. Splitting only helps if you want to send the first part earlier.
Sources
- Why cloud providers block port 25 and cap SMTP traffic (SimpleVerifier)
- SimpleVerifier pricing and plan limits
Figures marked as ours come from SimpleVerifier’s own dated tests on made-up addresses, published with their data on the research page. No customer data is used, and we publish no accuracy percentage because we have no independent measurement to back one.
Do it now
Test it on a real address first
Type any address. It gets the same check the paid plans run: syntax, the domain’s mail servers and, where the provider allows it, a live mailbox check. Nothing is sent to the address.
Five checks a minute, no account needed. Nothing is sent to the address — we ask its mail server whether the mailbox exists, then disconnect.
Have a list? Sign in with Google and the first 100 addresses are checked free, with results to download. No card.
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