I seem to be having a problem with Discourse sending emails over SMTP. I have verified my hostname with my Email Service Provider and have successfully sent emails with Telnet and via sendmail via the host VM as well as via Telnet within the Discourse Docker container. I had a look at integrating …

@pfaffman Thanks for having some time for this. As it transpired the issue was DNS related. Everything now working correctly :grinning:

Check your email service provider’s limits. Sometimes the sending fails when the quota is reached. Try sending an e-mail from Outlook. It happened to me once. Your problem may be different, but it may still be useful to someone.

[image] Matthew Lee: received a ‘host name could not be resolved’ error when emailing directly from the CLI. If you’re getting “hostname could not be resolved” it sounds like the hostname cannot be resolved, which is a problem. Does rake emails:test[you@somewhere.com] work? See also Troubles…

Thanks for the responses. I has a look over the weekend. I created a VM on Digital Ocean and set up SMTP with Brevo. Everything was okay. :slight_smile: So nothing wrong with Discourse. I figure Discourse uses a Ruby GEM such as NET::smtp to mail and that by default there is no smtp server install…

[image] Matthew Lee: by default there is no smtp server installed within the container But you configured SMTP the same way that you did on the Digital Ocean instance? What happens when you run the rake task?

Same: no connection. I am using different SMTP relays in each instance. There are a couple of tests I am running to validate: Install discourse via docker-compose locally Install Discourse in a different Azure tenant under a different subscription Validate both Brevo and SendGrid smtp relays I …

[image] Matthew Lee: Same: no connection. No connection is no connection. It’s pretty clear that you’re being firewalled. Maybe try port 2525? Or ask if your desired port is being blocked by your provider (e.g., digital ocean).

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pfaffman (Jay Pfaffman) July 1, 2024, 3:57pm 5

But you configured SMTP the same way that you did on the Digital Ocean instance?

What happens when you run the rake task?

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