--On Friday, October 09, 2020 6:29 PM +1300 Rob Kampen <rkampen at kampensonline.com> wrote: > If this reject is due to their spam filtering process, it is actually the > email author's problem - how they make up their sentences, key words etc. > and thus the problem will travel with them, to whatever email provider > they choose. > > Suggest they get educated in how to write an appropriate email that > doesn't raise alarms, or they could use mailchimp (e.g. only) for their > large group emails. Good point. Feed all your outbound mail to SpamAssassin and set it to retain the report in the output, directed to a local email account so you can review it via Dovecot. You could also direct it to an external mail account (eg. on a VPS) so you can see what it looks like to the outside world.