My forum no longer responds to replies sent by email. Reply by email has previously been working well, but it looks like this functionality stopped working around September 29th I have no definitive evidence for this timing, as the forum is not very active, but certainly it no longer works now, and the forum logs show no messages received after 29th September. The rejected emails log also has most recent entry on 29th September. All messages rejected have throwaway addresses and content that look like spam - so this seems to be working as it should. The bounced emails log is empty / shows ‘no logs found’ Messages are still being sent out by the forum generated by logged in user activity (I am getting them at least) though activity levels are even lower than normal due to above. Nearly all active users prefer email rather than browser based interaction. Test emailed replies to forum post email notifications sent from either my own Microsoft hosted email address or my Gmail address are not getting bounce warnings. They are simply disappearing without a trace. Nothing appears in the forum email log. The forum error log shows a couple of warnings (yellow exclamation mark icon) for September 29th ‘Email can not be processed: Email::Receiver::BadDestinationAddress Received…’ which seem innocuous / no different to previous similar logged events. I presume just rejected spam. On October 1st there is an actual error logged as: Message ActionDispatch::Http::MimeNegotiation::InvalidType (“%{#context[‘com.opensymphony.xwork2.dispatcher.httpservletresponse’].addheader(‘cbu0psig’” is not a valid MIME type) lib/middleware/omniauth_bypass_middleware.rb:71:in call' lib/content_security_policy/middleware.rb:12:in call’ lib/middleware/anonymous_cache.rb:353:in call' config/initializers/100-quiet_logger.rb:23:in call’ config/initializers/100-silence_logger.rb:31:in call' lib/middleware/enforce_hostname.rb:23:in call’ lib/middleware/request_tracker.rb:187:in `call’ Backtrace actionpack (6.1.4.1) lib/action_dispatch/http/mime_negotiation.rb:31:in rescue in block in content_mime_type' actionpack (6.1.4.1) lib/action_dispatch/http/mime_negotiation.rb:24:in block in content_mime_type’ rack (2.2.3) lib/rack/request.rb:69:in fetch' rack (2.2.3) lib/rack/request.rb:69:in fetch_header’ actionpack (6.1.4.1) lib/action_dispatch/http/mime_negotiation.rb:23:in content_mime_type' actionpack (6.1.4.1) lib/action_dispatch/http/request.rb:269:in media_type’ actionpack (6.1.4.1) lib/action_dispatch/http/request.rb:355:in form_data?' rack (2.2.3) lib/rack/request.rb:445:in POST’ actionpack (6.1.4.1) lib/action_dispatch/http/request.rb:400:in block (2 levels) in POST' actionpack (6.1.4.1) lib/action_dispatch/http/parameters.rb:88:in parse_formatted_parameters’ Env HTTP HOSTS: nzarchitecture.net.nz I have no idea if this is relevant though, and no further errors or fatal errors (denoted with light or dark red cross icons) have appeared in the log since then. Neither of my email addresses appear to be spammy or otherwise blacklisted when tested on www.mail-tester.com, and no issues with communicating with humans from these addresses have been encountered. The forum uses Mailgun, though I presume this is just for sending bulk emails, and that any issues with the Mailgun account or API key should not affect messages incoming? As it happens there are no obvious issues or error messages with the Mailgun found when I log in to my Mailgun account. I assume the Mailgun API key must be ok if the forum is still sending mail ok. No forum settings have been changed since reply by email was working, and I see the ‘reply by email’ setting checkbox is still ticked. The forum is hosted on Digital Ocean. No DNS settings for the domain have been changed in Digital ocean settings, and forum MX records seem ok/unchanged. The forum has been updated to 2.8.0 beta 7 since the issue started (presumably rebuilding in the process), but no improvement. What am I missing here? What likely went wrong? How do I get reply by email to start working again?

its been changed in the last 5 months [image]

[image] Paul_King: Reply by email has previously been working well, but it looks like this functionality stopped working around September 29th I know what is going on. It’s that @#(($* LetsEncrypt thing again that broke half the internet many things on Sept 30. [image] Self-hosted mail-receiver update following Let's Encrypt root certificate change Self-hosting This announcement only affects self-hosters who are running Configure direct-delivery incoming email for self-hosted sites with Mail-Receiver. Managed hosting customers, and self-hosters using POP3 for incoming mail are not affected. As you may be aware, Let’s Encrypt recently changed their root certificate. The old root certificate expired today, and has caused a number of issues for out-of-date clients across the web. All of our systems at CDCK are up-to-date, and were not affected by today’s… Just rebuild the mail receiver Docker.

[image] RGJ: It’s that @#(($* LetsEncrypt thing again that broke hahahahaha, yes. i forgot about that. LOL

You got to follow the topic that @RGJ posted. That should fix your issue. [image] Self-hosted mail-receiver update following Let's Encrypt root certificate change Self-hosting This announcement only affects self-hosters who are running Configure direct-delivery incoming email for self-hosted sites with Mail-Receiver. Managed hosting customers, and self-hosters using POP3 for incoming mail are not affected. As you may be aware, Let’s Encrypt recently changed their root certificate. The old root certificate expired today, and has caused a number of issues for out-of-date clients across the web. All of our systems at CDCK are up-to-date, and were not affected by today’s…

[image] RGJ: Just rebuild the mail receiver Docker. Ah, ok. That sounds promising! How do I rebuild ‘mail receiver docker’? is this different to the rebuilding of ‘docker manager’ that happens when updating the forum via dashboard? Do I just follow this? How do I manually update Discourse and Docker image to latest? - howto / admins - Discourse Meta

you need to login to the command line side of your site. It’s not via the forum admin dashboard.

Hi, I was able to rebuild mail receiver docker using instructions at that link Direct-delivery incoming email for self-hosted sites - howto / sysadmin - Discourse Meta Had to upgrade / resize my Digital Ocean droplet to do it, as even after deleting all backups etc stored on host, there was not enough disk space to do a rebuild After rebuild, I was able to send that message to staff@nzarchitecture.net.nz - and the forum log this time acknowledged it. However when I try to reply by email to an existing topic of the forum that I have been notified about, while the incoming messages are now acknowledged, none appear on the forum, and all get Mail Delivery Failure warnings in email log. Incoming messages are not appearing in Bounced Email log, but do all appear in Rejected Email log with warning [Email::Receiver::BadDestinationAddress] - including my own administrator email account which I would hope does not suddenly have a bad destination address

Have you rebuilt your mail receiver lately?

Yes - did that about half an hour ago, which resulted in the post above. I have just now done another full rebuild, and (touch wood) things seem to be working again

[image] Paul_King: have just now done another full rebuild, and (touch wood) things seem to be working again Could be that force https was not set and the rebuild fixed it.

Self hosted Reply by Email stopped working after latest update

Product Support

pfaffman (Jay Pfaffman) October 26, 2021, 2:00am 18

Could be that force https was not set and the rebuild fixed it.

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