feedmail-is-a-resend

feedmail-is-a-resend is a variable defined in `feedmail.el'.
Its value is

nil

Documentation:
Non-nil means the message is a Resend (in the RFC-822 sense).
This affects the composition of certain headers. feedmail sets this
variable as soon as it starts prepping the message text buffer, so any
user-supplied functions can rely on it. Users shouldn't set or change this
variable, but may depend on its value as described here.