Subaddresses provide a convenient handle for screening e-mail messages with DELIVER. For a general discussion of subaddresses, refer to Section 2.3.

To screen mail based upon a subaddress, you must use a 1, 2, or 3 action to obtain the envelope To: address associated with the mail message being delivered to you. You cannot use headers since there is no requirement that your address has to appear in the header of messages you receive, either with or without the subaddress. For instance, to detect the subaddress "junk-mail", use the directives

* * * T 2 "ENVELOPE-TO" * "*+junk-mail*" * T D WASTEBASKET

The first of these two directives tells DELIVER to use the envelope To: address for 2-pattern The second directive then causes any messages with +junk-mail appearing in the envelope To: address to be filed to your WASTEBASKET folder.