Please read the below article carefully. It will save you a lot of trouble.
http://www.postfix.org/SMTPD_ACCESS_README.html On Nov 23, 2013 3:39 PM, "Alexander Farber" <alexander.far...@gmail.com> wrote: > 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 > > > > >
