My Gitlab (version 5) is not sending any e-mails and I am lost trying to figure out what is happening. The logs give no useful information. I configured it to used sendmail.

I wrote a small script that sends e-mail through ActionMailer (I guess it is what gitlab uses to send e-mail, right?). And it sends the e-mail correctly.

But, on my Gitlab, I can guarantee that sendmail is not even being called.

Do I need to enable something to get e-mail notifications? How can I debug my issue?

Update

The problem is that I can not find any information anywhere. The thing just fails silently. Where can I find some kind of log? The logs in the log dir provide no useful information.

My question is, how can I make Gitlab be more verbose? How can I make it tell me what is going on?

Update 2

I just found a lot of mails scheduled on the Background jobs section. A lot of unprocessed Sidekiq::Extensions::DelayedMailer. What does it mean? Why were these jobs not processed?