One correction: > > Anyway, if you can identify all the the mail2news gateways AND your users > > must use your server set up a transport map: > > > > /etc/postfix/main.cf > > transport_maps = hash:/etc/postfix/transport > > > > /etc/postfix/transport: > > mail2n...@axample.com newsgateway: > > mail2news@other.example newsgateway: > > > > (or use a pcre: map if you want broader coverage). > > > > /etc/postfix/master.cf: > > newsgateway unix - - n - - smtp > > -o header_checks=pcre:/etc/postfix/news-header-checks.pcre
That should be smtp_header_checks (make changes while delivering), not header_checks (make changes while receiving). Wietse > > Then populate news-header-checks.pcre with all the patterns that > > you need to modify or discard information. It will of course break > > DKIM signatures so be aware of that in your DMARC policies. > > > > Wietse > > Thanks a lot for your help, much appreciated! > > Best regards > Stefan > > -- > Signal (Desktop) +4915172173279 > https://keybase.io/stefan_claas > >