Use case · SimpleVerifier Team
Email verification for SDRs and sales development teams
Verify every prospect export before it is enrolled in a sequence. Enroll valid addresses, send risky catch-all addresses in a separate low-volume sequence, and drop invalid ones. Contacts age quickly: BLS data shows 20.6% of US workers had been with their employer a year or less in January 2026, so an old export is a risk even if it was clean once.
SDRs share domains and mailboxes, so one rep's bad list affects everyone's inbox placement. A short verification step before enrollment is the cheapest control a team has.
The step should take minutes and fit the way the team already works: export, check, import.
What goes wrong on SDR lists
Shared sending reputation
Reps usually send from several inboxes on a few domains. Bounces from one list count against the domain for everyone. Sequencers pause on their own thresholds (for example Instantly at 5%), after the damage is done.
Exports go stale
A job change usually kills a work mailbox. BLS reports 20.6% of workers had under a year with their employer (Employee Tenure, January 2026), which is why B2B contact data decays between enrichment and send.
Catch-all domains
Many company domains accept all mail, so the mailbox cannot be confirmed. These come back risky and need their own handling (catch-all domains explained).
Role addresses
info@ and sales@ reach a team, not a prospect. Pull them out with the role-based email filter unless the pitch is for the team.
From export to enrolled
Export as late as possible
Pull the list from Apollo, Sales Navigator, Clay or your CRM on the day you plan to enroll. Guides: Apollo, Clay, Sales Navigator.
Upload the file unchanged
The email column is found automatically and every other column comes back in the output, so merge fields and owner assignments survive.
Enroll the valid file
Import it into the sequencer. Set the team's own bounce alert below the platform default, so a problem shows up before a mailbox provider notices.
Run risky catch-all rows separately
Use one well-warmed inbox and a small daily cap. Watch the first sends and stop the segment if hard bounces appear. Trade-offs are in sending to catch-all emails.
Re-verify before follow-up steps
Leads that wait weeks between steps need a fresh check. Re-running a file is a one-minute job.
What SDRs do with each result
| Result | What to do | Why |
|---|---|---|
| valid | Enroll | Mailbox confirmed. |
| risky · Accepts all addresses | Separate low-volume sequence | Cannot be confirmed over SMTP. |
| risky · Role-based address | Usually remove | Shared inbox. |
| risky · Server would not confirm | Hold, re-check tomorrow | Often temporary. |
| invalid | Remove | Would hard-bounce. |
Common questions
- When should an SDR verify a list?
- Right before enrolling it in a sequence, and again before follow-up steps if leads have been waiting for weeks. A result is a snapshot of the day it ran.
- What do I do with catch-all addresses?
- Do not mix them into the main sequence. Send them as a separate low-volume sequence from a warmed inbox and stop if hard bounces appear.
- Does verification guarantee replies or inbox placement?
- No. It removes addresses that would bounce. Placement also depends on authentication, volume and content.
- Can the whole team use one account?
- Team seats come with the higher plans (Business and Agency include teammates who share the account's lists, volume and API keys); pricing lists the seats on each plan.
Verify your next prospect list
Pro is $29.99 a month and never cuts you off: the first 100,000 emails a month run at full speed, then big lists run slower. CSV uploads, the API (10,000 calls a month, then $1.50 per 1,000), the Google Sheets add-on and the email finder are all included. Cancel any time.
The first 100 checks are free with a Google sign-in and no card, once per account.