new.rb

class <%= class_name %> < ActionMailer::Base
  delivers_from "mail@<%= Rails.application.name %>.com"
<% for action in actions -%>

  # Subject can be set in your I18n file at config/locales/en.yml
  # with the following lookup:
  #
  #   en.actionmailer.<%= file_name %>.<%= action_name %>.subject
  #         
  def <%= action %>
    @greeting = "Hi, "
    mail(:to => "")
  end

<% end -%>
end

old.rb

class <%= class_name %> < ActionMailer::Base
<% for action in actions -%>

  def <%= action %>(sent_at = Time.now)
    subject    '<%= class_name %>#<%= action %>'
    recipients ''
    from       ''
    sent_on    sent_at
    
    body       :greeting => 'Hi,'
  end

<% end -%>
end