feedmail-nuke-resent-bcc

feedmail-nuke-resent-bcc is a variable defined in `feedmail.el'.
Its value is

t

Documentation:
If non-nil remove Resent-Bcc: lines from the message headers.
In any case, the Resent-Bcc: lines do participate in the composed
address list. You may want to leave them in if you're using sendmail
(see `feedmail-buffer-eating-function').

You can customize this variable.