Issues with Discourse 3.5.0.beta2-dev - SMTP and Background Jobs

[phillcoxon (Phill)]

@Kirk

I performed a clean installation of Discourse on a new Vultr instance, using 20i’s SMTP service (smtp.stackmail.com ). However, emails were never delivered, despite:

I had a similar issue with email not sending on a brand new Discourse installation which I detailed here:

Troubleshoot email on a new Discourse install

Docs improvement suggestion: When configuring SMTP with an external provider (I was using SendGrid) I was not receiving registration emails. Running discourse-doctor identified the error: Reason: 550 The from address does not match a verified Sender Identity. While I had the top level domain (example.com) authenticated for sending in SendGrid, I had not yet authenticated the discourse subdomain (discourse.example.com) and so SendGrid was rejecting the API calls. While this only took me 15 m…

The issue was that the notifications email address in app.yml had not been authenticated with my SMTP provider (SendGrid).

Nothing appeared in the main Discourse logs, nor in the SendGrid logs. The error was surfaced when running discourse-doctor:

Reason: 550 The from address does not match a verified Sender Identity.

If you haven’t already done so I’d suggest running discourse-doctor as it may provide more insight into why emails aren’t being sent.