On Mon, Aug 15, 2011 at 10:30 AM, Jerico2day <jerico2...@gmail.com> wrote: > I'd like to have postfix dynamically change "my.domain.com" only on > Message-Id header to some arbitrary domain that would be > public-facing for all outgoing mail and change it back for incoming > mail. > > Unfortunately, I'm not quite sure how to do that. I would appreciate > any assistance.
First in your main.cf: header_checks = pcre:/etc/postfix/header_checks Secondly in your /etc/postfix/header_checks: /Message-Id:\s+<(.*?)@my.domain.com>/ REPLACE Message-Id: <$1...@my.domain.net> Thirdly, test it: $ postmap -q "Message-Id: <sdfsfsdf...@my.domain.com>" pcre:/etc/postfix/header_checks > Thanks! Note, ensure that your postfix installation supports pcre. My desktop is debian, so I call: $ apt-cache search postfix-pcre postfix-pcre - PCRE map support for Postfix
