…remember to send with the alias for the fake account’s email address.
I just spent an embarrassing amount of time troubleshooting inbound email because Discourse was rejecting every reply-by-email from my fake users. It had worked fine when I first tested several weeks ago…
I finally realized that in Gmail I’d been forgetting to switch my “From” address to the alias for the fake Discourse account: my.name+DiscourseTest@gmail.com
slaps forehead
I got a little sidetracked because the error shown in the Rejected list is Email::Receiver::BadDestinationAddress
(Something like ::UnknownSender would have clued me in faster.)
Posting in case it could help someone someday.