title: Rails mailer, associated with a model
body: <p>I need a kind of mailer, that is associated with a model.</p>
  
  <p>For example, it should notify subscribers, when, e.g. message is posted in a topic in question.</p>
  
  <p>I should see, that mails are delivered, how much recipients, mail body etc.</p>
  
  <p>AFAIK, standard ActionMailer in Rails 2.3 does't have a deal with storing something in DB.</p>
  
  <p>Is there any GEM or plugin for it ?</p>