Quick hack to test Rails3 mailers.

dev_deliver.rb

class Mail::Message 
  def dev_deliver(to)
    @dev_smtp ||= Mail::SMTP.new({
        :address              => "smtp.gmail.com",
        :port                 => 587,
        :user_name            => 'GMAIL-USERNAME',
        :password             => 'GMAIL-PASSWORD',
        :authentication       => 'plain',
        :enable_starttls_auto => true
    });
    dev_mail = self.dup
    dev_mail.from = '[email protected]'
    dev_mail.to = to
    @dev_smtp.deliver! dev_mail
    to
  end
end

Usage.rb

mail(:to => ....).dev_deliver('[email protected]')  # will deliver through this mailer to '[email protected]'