I read this page http://www.postfix.org/FILTER_README.html but I am not having any luck getting my pipe set up.
I want to make it so all mail destined for a particular subdomain is run through a script and then discarded. The 'all mail for a subdomain' requirement makes me think I need to use the virtual map. Can you connect the output of a virtual domain to a particular transport? I haven't had any success getting it to work. i added this line to master.cf: myfilter unix - n n - 10 pipe flags=Rq user=filter argv=/usr/bin/php /usr/local/bin/filter.php and this line to transport: in.mydomain.com myfilter: not sure what to add (if anything) to virtual. i tried this: in.mydomain.com virtual in...@in.mydomain.com myfilter: -jsd-