Replies apparently do not reach Discourse and/or are not properly being processed by it.
The Postfix Docker container on web06.haj.ipfire.org logs the following: <23>Apr 24 08:42:17 receive-mail[2746]: Recipient: replies+d16d49b822f0ab1fbc4860010f1a7d78@community.ipfire.org <19>Apr 24 08:42:17 receive-mail[2746]: Failed to POST the e-mail to https://community.ipfire.org/admin/email/handle_mail: SSL_connect returned=1 errno=0 state=error: certificate verify failed (OpenSSL::SSL::SSLError) <19>Apr 24 08:42:17 receive-mail[2746]: /usr/local/lib/ruby/2.3.0/net/http.rb:933:in `connect_nonblock' /usr/local/lib/ruby/2.3.0/net/http.rb:933:in `connect' /usr/local/lib/ruby/2.3.0/net/http.rb:863:in `do_start' /usr/local/lib/ruby/2.3.0/net/http.rb:852:in `start' /usr/local/lib/ruby/2.3.0/net/http.rb:1398:in `request' /usr/local/bin/lib/discourse_mail_receiver.rb:46:in `process' /usr/local/bin/receive-mail:12:in `<main>' <22>Apr 24 08:42:17 postfix/pipe[2745]: DF36F1009D1: to=<replies+d16d49b822f0ab1fbc4860010f1a7d78@community.ipfire.org>, relay=discourse, delay=0.35, delays=0.17/0.01/0/0.18, dsn=4.3.0, status=deferred (temporary failure)
This seems to be caused by a bug that has been introduced with the last update that I installed some time this week. Since this is all Docker-based, I can only try to relaunch this and see if problems are gone.