Troubleshooting: Problems when receiving emails with SPF checks

Emails that should be delivered are declared invalid by SPF checks.


SPF checks are performed for all incoming emails for whose sender’s domain a TXT record is set. Incoming emails of certain domains are incorrectly declared invalid.

Cause: Errors in TXT entry of the communication partner

Remedy: Informing your communication partner

Inform the communication partner about a possible incorrect SPF configuration.

Remedy: Adding IP addresses to the allow list

  1. Open the Control Panel.
  2. Select the affected domain from the scope selection.
  3. Navigate to Deny & Allow Lists.
  4. Select the tab Allow list.
  5. Enter the IP address of the communication partner in the field Add entry.
  6. Click on Add to confirm your input.