@tobiaseigen Getting closer! Made the change by dropping the incoming mail subdomain from the endpoint. Saved, then re-started the mail receiver (because I know not what I do!). Tested. No-luck. Then did a full rebuild of the app. Then made two new accounts using separate email addresses. I then used the admin account to PM one of these. That generated an email as expected. I then replied through email to the PM. Here’s the result in the mail log:
<22>Nov 25 02:38:20 postfix/pipe[89]: AB09913F5CB: to=<replies+da32f82583043bb63fee8be53f9bd3fd@inbound.[mydomain].org>, relay=discourse, delay=0.35, delays=0.19/0/0/0.15, dsn=4.3.0, status=deferred (temporary failure)
Indeed we’re getting closer! Not sure what the temporary failure is all about? It’s been 13 minutes, still not delivering into Discourse. Strange.
I should note, I made the “inbound” subdomain because I want an admin@[mydomain].org email address to be handled by a different mailhost.