Hi all, and apologies if this is similar to some of the other posts that mention this error. For the last four days all emails have stopped getting sent, and the test email also fails. I have browsed through existing topics that are similar, but in my case nothing (that I am aware of) has changed,…

Follow [صورة] Discourse SMTP sends "EHLO localhost" instead of domain, breaking Google smtp-relay bug Can you please try adding a new line with DISCOURSE_SMTP_DOMAIN: conversation.sevarg.net and try again? Fill the new env var with your email domain and rebuild.

I’ve had good luck on these forums before helping track down and solve issues. Not sure why this one is so quiet.

It’s possible that it’s an gmail/gsuite smtp issue, but @Syonyk mentioned he was able to manually send an email through telnet on his droplet. I’m not nearly experienced enough to know how g-suite might interpret traffic dispatched from the site compared to manually sent message, but that seems to …

Without a good trace of the SMTP conversation from Discourse, I don’t know how to troubleshoot any further - and I don’t know how to get those traces.

Is there any way to confirm the number of emails I’m sending out of discourse per month? If I need to go to another smtp-relay I’d need to know what sort of budget I’d need. This is super frustrating.

Under /admin/email/sent on your instance, you should be able to see what’s been sent and estimate usage from there.

Hm… I tossed a tcpdump on the server and ran discourse-doctor. And found this in the output… ... 0x0030: d10f f8e4 4548 4c4f 206c 6f63 616c 686f ....EHLO.localho 0x0040: 7374 0d0a st.. ... 0x0030: de62 f0c3 3432 3120 342e 372e 3020 5472 .b..421.4.7.0.Tr 0x00…

This is so strange. Where would this have suddenly crept in? I haven’t done any updates.

It hasn’t crept in, it’s been like this. Google changed something. discourse-doctor calls the test in /var/www/discourse/lib/tasks/emails.rake - if you’re in the image. I changed: Net::SMTP.start(smtp[:address], smtp[:port], 'localhost', smtp[:user_name], smtp[:password], smtp[:authentication]) …

I’ve definitely seen these guys on the forums. They monitor them fairly closely from what I can tell. I’d say github but issues seem to be disabled for the repo.

Ok. This is a test email from https://conversation.sevarg.net Email deliverability is complicated. Here are a few important things you should check first: I’ve just demonstrated a fix, but I do not know how to upstream this. cd /var/discourse ./launcher enter app vim ./vendor/bundle/ruby/2.7.0/…

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Falco (Falco) 26 يناير 2021، 10:02م 25

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What does DISCOURSE_SMTP_DOMAIN mean?

الموضوع		الردود	مرات العرض
Gsuite smtp-relay issue "end of file reached" Support	5	944	20 يناير 2021
Discourse SMTP sends "EHLO localhost" instead of domain, breaking Google smtp-relay Bug	26	5507	23 فبراير 2021
Mail does not go out after recent update Support email	23	362	13 مارس 2026
Mail test failure in discourse-doctor Support email	18	251	13 مارس 2025
Discourse with other websites, SMTP issue: End of file reached Self-hosting	8	2388	22 أكتوبر 2020

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