Jacques Gauthier <jacques_g(_at_)yahoo(_dot_)com> writes a while ago:
I placed a filter in my .procmailrc so that it would
delete anything not addressed to me. ei:
The TO field does not contain my email address.
This works well except that my mailing list still
posts it to everyone.
(My .forward file looks like this)
salsa-request: "|exec /home/salsa/slist/.bin/flist salsa-request"
salsa: "|exec /home/salsa/slist/.bin/flist salsa"
"|IFS=' ' && exec /home/salsa/procserver/bin/procmail -f- || exit 75 #salsa"
Those first two lines belong in the system alias file, say, /etc/aliases,
not your .forward file.
Philip Guenther