On Mon, Jul 06, 2020 at 08:17:16AM +0100, Alf Vark wrote: > Like this: > > msg --> postfix(25) --> filter(25) --> postfix(10025) --> mailbox
Postfix implements loop detection on port 25. If you run your filter
on an alternate port, the HELO name will not be a problem.
--
Viktor.
