class Mail::TestMailer

if you want to make a custom mailer for Mail
It also provides a template of the minimum methods you require to implement
when you are testing.
The TestMailer is a bare bones mailer that does nothing. It is useful

def self.deliveries

Provides a store of all the emails sent with the TestMailer so you can check them. 
def self.deliveries
  @@deliveries ||= []
end

def self.deliveries=(val)

* and other common Array methods
* size
* length
* clear
* << (message)

If you place another object here, please make sure it responds to:

call TestMailer.deliveries.clear.
other object. If you just want to clear the store,
Allows you to over write the default deliveries store from an array to some 
def self.deliveries=(val)
  @@deliveries = val
end

def deliver!(mail) 

def deliver!(mail)
  # Create the envelope to validate it
  Mail::SmtpEnvelope.new(mail)
  Mail::TestMailer.deliveries << mail
end

def initialize(values) 

def initialize(values)
  @settings = values.dup
end