Probably one of the most desired features, when installing software to manage your git repository like gitlab, is to allow notification emails to be send. It's not the most important, but nevertheless still quite useful. And while it might be clear to people that dealt before with ruby or ruby on rails applications, it wasn't for me, and gitlab documentation hasn't mentioned it anywhere... How to configure mail sending with smtp servers!?

Took out some digging for me and Andrew, but finally found it, so here's short instructions on this topic (Should work on gitlab 5.2 and higher, haven't tried it on lower):

First, find your config/environments/production.rb file. Find lines that starts with config.action_mailer.

Make sure to have delivery_method set to smtp like that:

config.action_mailer.delivery_method = :smtp

Now find config/initializers/smtp_settings.rb (You might have it as smtp_settings.rb.sample). Here's how it should look line more or less, if setting up with gmail mailbox:

if Gitlab::Application.config.action_mailer.delivery_method == :smtp
  ActionMailer::Base.smtp_settings = {
    address: "smtp.gmail.com",
    port: 587,
    user_name: "yourgmail@gmail.com",
    password: "gmai_password",
    domain: "gmail_account_domain",
    authentication: 'plain',
    enable_starttls_auto: true
  }
end

The domain parameter is applicable to Google Apps account, as these are using own domains usually. Don't remeber what do you need that to set if you use regular gmail account.