There have been a lot of updates recently. One busted the subject line (no longer includes the category) and now no mail goes out at all. Users are very unhappy. I don’t know how to start debugging this issue. Where can I error logs and I recall there is some page about sidekiq queues and so on, but…

The cause of this may be sidekiq failing to process scheduled jobs when it should. We identified the same problem earlier today on our CD sites. Make sure you are at least the commit: DEV: Revert unintentional rb deps updates (#37144) co…

I confirm hundreds of failed sidekiq jobs on latest-release +103 fixed on latest-release +153

I am updated to latest and am still having an email sending problem on one of my sites. I just get an error message when sending a test email. ERROR - end of file reached On mobile now we’ll check sidekiq and logs when I am at my computer. Any other suggestions where to look? ▶ Backtrace Just tr…

Hi Tobias! [صورة] tobiaseigen: Job exception: end of file reached … /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/net-smtp-0.5.1/lib/net/smtp.rb:1017:in `recv_response' /var/www/discourse/vendor/bundle/ruby/3.3.0/gems/net-smtp-0.5.1/lib/net/smtp.rb:676:in `block in do_start' Your problem …

Hi Michael! Thanks for the response. I miss you guys so much! :smiling_face_with_three_hearts: Hmm.. I just moved my site from DO to Hetzner and it worked fine for a couple of weeks. My other site is working fine too. It’s a puzzle. Only sometime about a week ago it stopped working and when I looke…

I think it’s failing before even attempting login. To eliminate Discourse as a factor, try from the host AND from inside the container: $ openssl s_client -connect smtp.mailgun.org:587 -starttls smtp You should get a bunch of output and then be able to try to auth: ○ → openssl s_client -connect …

I tried swaks and got this: === Trying smtp.mailgun.org:587... === Connected to smtp.mailgun.org. *** Remote host closed connection unexpectedly. That inspired me to check from my other server, where swaks had “Great success” - the message is quite adorable! <~ 250 Great success ~> QUIT <~ 221…

[صورة] tobiaseigen: *** Remote host closed connection unexpectedly. Makes sense; this is essentially the same error as [صورة] tobiaseigen: EOFError: end of file reached As you suspect, the most likely cause is something external interfering with the connection.

i have a suspicion you need to use port 2525 instead of 587

Hetzner explicitly states they do not block port 587. Also, if they did it would probably show up as a failure to establish a connection.

[صورة] tobiaseigen: That inspired me to check from my other server, where swaks had “Great success” - the message is quite adorable! That almost rules out Discourse and Mailgun configuration. At this point the most useful diagnostic is to try an alternate Mailgun submission port from the aff…

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supermathie (Michael Brown) 19 يناير 2026، 10:19م 14

تذكر هتزنر بشكل صريح أنها لا تحظر المنفذ 587.

أيضًا، إذا كانت تفعل ذلك، فمن المحتمل أن يظهر ذلك على شكل فشل في إنشاء اتصال.

الموضوع		الردود	مرات العرض
Emails have stopped sending - end of file reached Support	27	4665	23 فبراير 2021
Sidekiq got error when sending mail after upgrade to latest version Support sidekiq	2	109	4 مارس 2025
Severe Email Issue since last update a couple days ago - 3.4.0.beta4-dev Support	25	474	16 فبراير 2025
See the failed jobs in Sidekiq. (MailGun) failing to send emails Support email	7	130	8 يوليو 2025
Email failing with network timeout Support	5	1218	29 ديسمبر 2018

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