GitLab 6.1 email (smtp) configuration.

smtp_settings.rb

# To enable smtp email delivery for your GitLab instance do next:
# 1. Change config/environments/production.rb to use smtp
#    config.action_mailer.delivery_method = :smtp
# 2. Rename this file (config/initializers/smtp_settings.rb) to smtp_settings.rb 
# 3. Edit settings inside this file
# 4. Restart GitLab instance
#
if Gitlab::Application.config.action_mailer.delivery_method == :smtp
  ActionMailer::Base.smtp_settings = {
    address: "smtp.gmail.com",
    port: 587,
    user_name: "yourname@gmail.com",
    password: "yourpassword",
    domain: "gmail.com",
    authentication: :plain,
    enable_starttls_auto: true
  }
end