You could do this with seive. But it seems like an odd rejection. I am sure I am not the only person who fires notes to themselves via email with no subject.
Sent from my iPhone > On 19 May 2016, at 11:06, Wietse Venema <wie...@porcupine.org> wrote: > > Thomas Keller: >> Hello list, >> >> what would be the easiest way to block emails with no subject ? > > Did you mean: > > 1) No Subject: line. For this case you need an external content > filter (Milter, smtpd_proxy_filter, filter). > > 2) A Subject: line without text. Postfix can match this with > header_checks. > > Wietse >
