You can drop received header without dedicated postfix, just do it with milter instead. Rspamd can do it for you with very small Lua script, and do SPF/DKIM/DMARC & ARC all together.
-- *Best Regards,* Dmitriy Alekseev DevOps Engineer On Sat, 10 May 2025, 21:37 Ken Biggs via Postfix-users, < postfix-users@postfix.org> wrote: > Thank you all so much for all your help! I don't think I'm up for setting > up a separate postfix instance for outgoing email. It's pretty obvious I'm > a novice working with Postfix. Actually not really sure if removing the > Received headers was accomplishing anything anyway. Google doesn't give > you much to work with on their spam filtering. It was a stab in the dark. > It's also probable that being an Akamai IP, there's someone doing something > on my C block that triggers Google to have a poor reputation for the whole > block and that might be the issue. I like having my own server and > managing the install from the operating system up, so maybe I just have to > live with some spam filtering of our outgoing email. > > > On May 10, 2025, at 2:29 PM, Wietse Venema via Postfix-users < > postfix-users@postfix.org> wrote: > > > > Matus UHLAR - fantomas via Postfix-users: > >> On 10.05.25 13:32, Ken Biggs via Postfix-users wrote: > >>> So continuing the saga ... digging into /etc/postfix/header_checks I > found > >>> a revision I made back in January to try to keep our outgoing email > from > >>> having headers with the IP address of the email client that sent the > email > >>> to the server and maybe keep Gmail from marking our outgoing email as > >>> SPAM. > >> > >>> /^Received:.*with ESMTPSA/ IGNORE > >>> /^X-Originating-IP:/ IGNORE > >>> /^X-Mailer:/ IGNORE > >>> /^Mime-Version:/ IGNORE > >> > >> These should not be used globally but only at submission level. > >> > >> This can be achieved by using separate postfix instance for submitted > mail > >> - I don't see possibility of configuring separate cleanup instance for > smtpd > > > > master.cf: > > > > submission inet n - n - - smtpd > > -o syslog_name=postfix/submission > > -o cleanup_service=submission_cleanup > > ... > > > > submissions inet n - n - - smtpd > > -o syslog_name=postfix/submissions > > -o cleanup_service=submission_cleanup > > ... > > > > submission_cleanup unix n - n - 0 cleanup > > -o header_checks=submission_header_checks > > -o mime_header_checks=submission_mime_header_checks > > > > But I'll be the first to admit that this is not 'easy to use'. > > > > Wietse > > _______________________________________________ > > Postfix-users mailing list -- postfix-users@postfix.org > > To unsubscribe send an email to postfix-users-le...@postfix.org > > _______________________________________________ > Postfix-users mailing list -- postfix-users@postfix.org > To unsubscribe send an email to postfix-users-le...@postfix.org >
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