Email Bounce Checker

Test whether an email address is likely to bounce before you send. Real SMTP verification, not just format checking.

Bounce Types Explained

Hard Bounce

The address does not exist or the domain has no mail server. Sending to hard bounces repeatedly will destroy your sender reputation. Remove these immediately.

Soft Bounce

The mailbox exists but is temporarily unavailable — full inbox, server timeout, or temporary rejection. May succeed on retry. Track patterns before removing.

Catch-all Risk

The domain accepts all email, so SMTP can't confirm the specific address. Our probability score tells you how likely this specific address is to be a real inbox.

Related Tools & Resources

Verify individual email addresses Check email deliverability Full email health check Bulk list cleaning Reduce bounce rates in email marketing Understanding verification result codes

Last updated: March 2026

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