Sender Filter Order of Evaluation

Message sender email addresses and domains go through approved sender and blocked sender list filtering. Sender email addresses are evaluated until the first match is found.

Messages from allowed sender addresses bypass IP reputation-based filtering at the MTA connection level and content-based filtering at the message level for spam detection, and proceed directly to malware detection. Messages from blocked email addresses are blocked.

Evaluation is done in the following order:

  1. End User Console blocked sender list

  2. Administrator console blocked sender list

  3. End User Console approved sender list

  4. Administrator console approved sender list

Note:

Approved senders added to the End User Console will not override blocked senders for the same email address or domain in the administrator console. For example, assume that *@example.com is in the blocked sender list of the administrator console, and john@example.com is in the approved sender list in the End User Console for an end user. Messages from john@example.com will still be blocked.