Hello Peter and others, On Sat, Nov 23, 2013 at 1:38 AM, Peter <pe...@pajamian.dhs.org> wrote:
> On 11/23/2013 12:38 AM, Alexander Farber wrote: > > /etc/postfix/header_checks: > > /^To: \S+\.\S+\.\S+\.\s...@gmail.com <mailto:s...@gmail.com>$/i DISCARD > > > > /etc/postfix/main.cf <http://main.cf>: > > header_checks = pcre:/etc/postfix/header_checks > > Header checks will certainly work, but it requires that postfix does > deep inspection of the message DATA in order to and before it can reject > the message. You're much better off checking the envelope recipient > with a check_recipient_access restriction. This too can use a pcre > table so you can match the recipient address against a regular > expression with three dots, then postfix won't have to do deep > inspection of the DATA packet, and can reject the mail at the RCPT TO > stage before the DATA is even transmitted to postfix, much more efficient. > thank you! So I have moved the line /^To: \S+\.\S+\.\S+\.\s...@gmail.com$/i DISCARD to the file /etc/postfix/access, but when I run # postmap /etc/postfix/access I get the warning: postmap: warning: /etc/postfix/access, line 452: record is in "key: value" format; is this an alias file? postmap seems not to like the whitespace after "To:", should I replace that space by \s+ as workaround? Or can I somehow tell postmap (I've read its manpage, but haven't find the answer), that it is a pcre database? And another question is what directive to put into main.cf to enable the check_recipient_access for OUTGOING mails? Regards Alex
