Filtering emails with an identical sender and recipient

Emails with an identical sender and recipient are normally spam or, at least in general terms, they are not "proper" messages. It is possible to set up a formula rule to filter them out.

In words: @Contains(Recipients;SMTPOriginator)

The Recipients field is used by the Domino router to deliver the email.
This field is deleted when the email finally arrives at its destination.
The Internet address of the sender is held in the SMTPOriginator field.

This rule can be used for any mail job (e.g. a wall mail job).

In this example, the email is quarantined instead of being delivered.

Note

One should always check whether the email is from an external source, as it might be the case with internal emails (Domino to Domino) that someone is sending to a group of which he or she is also a member.