Wietse asked: > What should happen with local submissions via /usr/sbin/sendmail?
Thanks, I forgot about those, they too should go to the separate smarthost. Your follow-up message passing options to pickup(8) would seem to take care of that. > /etc/postfix/master.cf > submission .. .. .. .. .. .. smtpd > -o ...usual submission options... > -o content_filter=smtp:filterhost.example > -o receive_override_options=no_header_body_checks Intriguing. To indulge my desire to better understand the internals, what is the difference between using -o content_filter=smtp:filterhost.example vs using -o relayhost=filterhost.example -o local_transport=smtp:filterhost.example ? Naively reading the documentation, I expect either case should cause all messages to go via SMTP to filterhost.example, but the latter approach did not work for me, and I'm curious to understand why... In appreciation, Alex
