I am having a hard time making the email sending in GitLab to work (changing email in profile settings). My server has exim4, I can tell its working because if I do simple mail() in PHP, it thus sends the email to the recipient. Now, in GitLab seems that it wasn't. So I modified productions.rb to have SMTP settings, and use Google SMTP:

  config.action_mailer.delivery_method = :smtp
  config.action_mailer.smtp_settings = {
    address: "smtp.gmail.com",
    port: 465,
    user_name: "[email protected]",
    password: "hashpassword",
    domain: "gmail.com",
    authentication: :plain,
    enable_starttls_auto: true
  }

I even tried changing the port to 587 and 467 but still it doesn't work. Why is that? Can you please lead me to where I am missing?