I’m going to reply to this thread, but I don’t have an answer, only to report we have the same isue. This only happened after I upgraded us from GitLab 10.X.X to 13.X.X, going through the recommended intermediate levels in the upgrade guide.
If I use the rails console, I can verify that sendmail is our delivery_method, and using the test_email function works. I am not getting pipeline emails, although I am getting emails to approve user registrations.
None of our groups or projects have notifications disabled globally. I have added myself to watch our important projects. I don’t get any notifications.