What to do when verification results don't match expectations.
An address shows valid but bounces
Possible reasons:
- Catch-all domain - Server accepts all emails
- Full mailbox - Mailbox was full at delivery time
- Greylisting - Temporary rejection
- Recent change - Mailbox deleted after verification
An address shows invalid but its owner says it works
Possible reasons:
- Aggressive spam filtering - Server blocked our check
- Firewall rules - Verification blocked
- Custom mail setup - Non-standard configuration
What to do
- Re-verify the email (results may differ)
- Check the detailed response fields
- Look at the quality score, not just status
- Consider the domain type (corporate vs. free)
Reporting issues
If you consistently see incorrect results, contact support@kawaa.com with:
- Email address(es) in question
- Expected vs. actual result
- Evidence (bounce message, user confirmation)