I'm using Postfix 2.7 and I'm trying to setup some header filters.
In main.cf I'm using regexp, not pcre.
/^Subject: .*Money/ REJECT
Which rejects an email with the word money in the subjectline. Now what if you want to reject the message if it does _not_ contain the word money? By documentation a prefix exclamation should do it:
!/^Subject: .*Money/ REJECT
but it doesn't work!!