Email verifier

Email verifier for single addresses and bulk lists.

Check one address in seconds, or upload a full list. Both give you the same clear result categories.

No monthly subscription · Credits never expire · Unknown results use no credits

Single email checks

Paste an address into Quick Verify to get a status and a reason right away. It's useful for checking a lead before you send a personal email.

Bulk verification

Upload a CSV or TXT file to check thousands of addresses at once. Duplicates are removed first.

Result explanations

Passed: the address passed the checks and looks deliverable.
Failed: the address is invalid or rejects mail.
Unknown: the server didn't give a clear answer, often because of catch-all behavior. No credit is used.

Export workflow

Download a CSV with the email, status, and reason for each row, then import it back into your email platform or CRM.

Frequently asked questions

How accurate is the email verifier?

No verifier can be 100% accurate, because some mail servers hide whether a mailbox exists. MailGuard marks those cases as Unknown instead of guessing.

Is there a free trial?

MailGuard is pay as you go. You buy a credit package, and Unknown results never use credits.

Ready to check your list?

Pay only for Passed and Failed results. Credits never expire.

Create account