Troubleshooting mail domains and delivery

Nearly all mail problems come down to DNS, sandbox limits or authentication alignment. Work through the checks below in order.

Domain will not verify

1. 1Open /mail/admin and refresh the domain status to get the latest result.
2. 2Compare each DNS record character for character with what Limnn shows.
3. 3Check that your DNS host did not append the domain twice, for example _domainkey.yourcompany.com.yourcompany.com.
4. 4Remove stray duplicate records and wait for propagation, then refresh again.

Mail sends but lands in spam

• Confirm DKIM and custom MAIL FROM are both verified, so SPF and DKIM align with your From domain.
• Publish a DMARC record and read its reports.
• Avoid sending large bursts from a brand-new domain; ramp up gradually.
• Remove bounced and complaining addresses promptly.

Mail only reaches some recipients

If messages reach internal or test addresses but not external recipients, the sending account may be in a restricted (sandbox) state or the recipient may be on your suppression list. Check the suppression list first, then contact Limnn support with an example address.

Inbound mail never arrives

• Verify the MX record for the receiving domain points to the inbound SMTP endpoint for your region.
• Make sure no other MX record has a lower priority number and wins.
• Check that the destination mailbox exists before testing.
• If the MX record is correct and mail still does not arrive, contact Limnn support with the sender, recipient and time of a test message.