>----- Original Message ----- >From: "Wietse Venema" <wie...@porcupine.org> >To: "Postfix users" <postfix-users@postfix.org> >Sent: Thursday, November 6, 2014 1:26:29 PM >Subject: Re: best approach to filtering one specific case? > >Mike Ray: >> The basic condition I'm trying to deal with is a message that has >> a certain subject *and* is destined for a particular address. > >Hi, I wrote Postfix. Postfix does not do combinations of headers >and other stuff. Such things are supposed to be "outsourced" to >external filters such as Amavisd, Milters, and the like. > >You might be able to cobble together something with header_checks >and such, but the solution falls apart when a requirement changes. > >> Secondly, I've heard that it is "better" to use milters (before-queue >> filters?) as opposed to content filters (after-queue filters?), > >There is no fundamental difference in functionality between Milters >and other before-queue filters. The main difference with after-queue >filters is that an after-queue filter can be chosen dynamically. > > Wietse
I should have been more clear. I understand that header_checks can't be checked together, but do you all think it reasonable to have a header_check for that specific address and then call a filter specific to this situation, one that could analyze the compound condition, or do you all avoid this kind of setup (if so, why)? E.g. /etc/postfix/main.cf: header_checks = /etc/postfix/checkme /etc/postfix/checkme /this_one_address@my.domain/ FILTER foo:bar Or have I misunderstood: http://www.postfix.org/FILTER_README.html#dynamic_filter ? -Mike
