The reason we chose MailView is because Rails 4.1 now supports this kind of behavior with [Action Mailer previews](http://edgeguides.rubyonrails.org/4_1_release_notes.html#action-mailer-previews) which I believe is based on 37 Signals' [mail_view](https://github.com/37signals/mail_view) so it should be pretty trivial to rip at this gem all together when we update to 4.1