rmail-retry-failure
rmail-retry-failure is an interactive compiled Lisp function in `rmail.el
'.
(rmail-retry-failure)
Edit a mail message which is based on the contents of the current message.
For a message rejected by the mail system, extract the interesting headers and
the body of the original message.
If the failed message is a MIME multipart message, it is searched for a
body part with a header which matches the variable `mail-mime-unsent-header'.
Otherwise, the variable `mail-unsent-separator' should match the string that
delimits the returned original message.
The variable `rmail-retry-ignored-headers' is a regular expression
specifying headers which should not be copied into the new message.