Sender ID and SPF Failures

October 13, 2017 Contributors

In tools such as Mail-Tester you will sometimes see in the Authentication section a line that reads like the following:

  "[Sender ID] does not allow your server to use [email protected]"

  Sender ID is like SPF, but it checks the FROM address, not the bounce address.
  You do not have a SPF record, please add the following one to your domain

  v=spf1 a mx ~all

These are relating to Sender-ID failures, not SPF failures. Unlike SPF, Sender-ID isn’t really in widespread usage, and more importantly, it focuses on the From (sender) domain, not the bounce (Return-Path) domain.

If you look at the Source of the message (in the "Click Here To View Your Message" section), you will see that the SPF did pass:

  Received-SPF: Pass (sender SPF authorized) identity=mailfrom;;;

If you want to resolve this issue with the Sender-ID, you can do either of the following:

  1. Update the SPF record for your domain to read as follows:


  2. Publish a proper Sender-ID record for your domain to read as follows:


For more detail refer to this article at