RailsMailPreview, will preview your email along with any attachments that are sent. This gives you an idea of what will be sent.
Available from the following link for FREE: https://github.com/downloads/fernyb/RailsMailPreview/RailsMailPreview.app.1.3.zip
An example of how to use RailsMailPreview is available from the following URL: http://fernyb.net/blog/2013/07/02/preview-email-in-rails/
Make sure to install the following gems:
* mail * sqlite3
Install the gems:
sudo macgem install mail sudo macgem install sqlite3
Be sure the directory where the gems will reside exists in my case the following was missing:
Create the missing directory, if needed:
sudo mkdir -p /Library/Ruby/Gems/MacRuby/0.12
Make sure to install the "rails_mail_preview" gem into your Rails web app.
sudo gem install rails_mail_preview