class Mail::Message

mail.resent_sender #=> 'mikel@test.lindsaar.net'
mail.resent_sender 'Mikel '

Example:

Also allows you to set the value by passing a value as a parameter

mail.resent_sender #=> 'mikel@test.lindsaar.net'
mail.resent_sender = 'Mikel '

Example:

this address.
spec. A sender per RFC 2822 must be a single address, so you can not append to
Returns the Resent-Sender value of the mail object, as a single string of an address

def resent_sender( val = nil )
  default :resent_sender, val
end