Known Domains

This page allows you to specify domains (the part of a mail address after the @ symbol) of senders you wish to recognise. You can then decide whether you wish to Reject email from the domain, Accept it, or tag it with a spam header.

Possible uses of this might be

  • Reject
  • Accept

Technical detail

This page allows you perform matching against the domain of the email address portion of the MAIL FROM parameter of the SMTP conversation (the envelope address).

Recieved mail has a header, Return-Path:, added with this address. You may need to enable a “show all headers” or “view message source” feature in your mail client to see this.

NOTE this is not the same as the From: header.