Rails Dispatch | Presented by Engine Yard

Rails Dispatch | Presented by Engine Yard:

One of the more confusing parts of the prior ActionMailer API for new users was a number of mysterious methods you needed to use. These were methods that started with deliver_ or create_ and were not defined directly by the user but were instead dynamically generated by ActionMailer, one pair for each mailer method the user defined. So if you had a Mailer action called welcome_email , you were not allowed to just call welcome_email , instead you would have to call deliver_welcome_email to directly send the email or create_welcome_email to get a TMail object to play with. You would then go ahead and use these in your Rails App.

Full article: http://railsdispatch.com/posts/actionmailer