Troubleshooting: Problems when sending emails with an SPF entry set up

The recipient's server declares emails sent by you invalid because of SPF checks and does not deliver the emails.

Condition:

One of the following conditions is fulfilled:

  • SPF checks are only performed if the sender’s domain and the recipient’s domain are the same. Incoming internal emails are incorrectly declared invalid.
  • Your communication partner informs you that emails from your domain are declared invalid by SPF checks.

Cause: Your own TXT record is wrong

The IP addresses of your mail servers registered in the TXT record are wrong or missing.

Remedy: Editing the TXT entry

Add the missing IP addresses of your mail servers to the TXT entry or correct the IP addresses.