Nutsmuggling

It’s not rocket science, but since I took a while to figure this out I thought I’d share:

ActionMailer::Base.smtp_settings = {
  :enable_starttls_auto => true,
  :address => "smtp.gmail.com",
  :port => 587,
  :domain => "your-google-apps-domain",
  :authentication => :plain,
  :user_name => "username",
  :password => "password"
}

The most important line is enable_starttls_auto => true.

Unlike pre 2.2 Rails, no plugin is required. Not sure this setup works with Rails 2.2 though, never tried it.

Via this forum discussion.