cli

~/ mail -v my@email.address.com
Subject: Sup?
Sup dude, mail like sucks today
Cc:
...
221 Bye

#This works.

Mailer.rb

class Mailer < ActionMailer::Base
  default :from => Devise.mailer_sender, :bcc => 'log@domain.net'
  helper :mailer

  def signup_reminder(user)
    @name = user.first_name
    subject = "Dont forget .. "
    mail(:to => user.email, :subject => subject)
  end
end

out.rb

ActionMailer::Base.delivery_method
=> :smtp

ActionMailer::Base.smtp_settings
=> {:address=>"localhost", :enable_starttls_auto=>false, :domain=>"mydomain.com"}

user = User.find 123
m = Mailer.signup_reminder(user).deliver # Nothing

m.errors
=> []

production.rb

App::Application.configure do |config|
  
  # Mail Config
  config.action_mailer.delivery_method = :smtp
  config.action_mailer.smtp_settings = {
    :address => 'localhost',
    :enable_starttls_auto => false,
    :domain  => 'domain.com'
  }
  config.action_mailer.perform_deliveries = true
  config.action_mailer.raise_delivery_errors = true
end