Verify your lead lists
Leads from exports, events and enrichment tools are only as good as their email addresses. Verify the list before your team spends hours emailing addresses that bounce.
How it works
- 1
Combine and export
Put your leads in one CSV. Duplicates are skipped for free, so overlap does not cost you.
- 2
Verify
Upload to MailSure and let it run.
- 3
Hand your team a clean list
Download valid addresses for outreach and keep the risky ones for a cautious second pass.
Why use MailSure for this
Save your team's time
Reps stop writing to addresses that cannot receive mail.
Keep sender reputation intact
Lists with high bounce rates can damage the domain your whole company sends from.
Honest unknowns
When a server will not confirm a mailbox, you get 'unknown' and you are not billed for it, rather than a guess.
See how the price compares in the pricing comparison, or try the free email checker first.
Frequently asked questions
- Should I buy email lists?
- Be careful. Purchased lists often breach consent rules and perform badly. Verification removes dead addresses but cannot give you permission to email people.
- What does 'risky' mean?
- The domain accepts mail but something is uncertain: a shared role address, a catch-all domain, or an unconfirmed mailbox.
- Do you find emails?
- No. MailSure verifies addresses you already have; it does not find or scrape them.