Quoting http://home.worldonline.dk/~byrial/newsbody/ :
The program newsbody is a little utility to isolate the body part of a news or
email message in a separate file and then call some other program which may
change the body, and eventually merge the headers with the possibly changed
body. Optionally quotes and/or signature can be removed too, as well as all or
selected header lines can be kept. Newsbody can use both named files and pipes
for both input and output.
It is typically called from a newsreader (e.g. from slrn's `post_filter_hook'),
a mailer (e.g. from mutt's `filter-entry' or `ispell' commands) or an editor.
It can e.g. be used to spell check or encrypt the message before sending.
Newsbody is free software. It is released under the terms of the GNU General
Public License. It is developed under Linux, but I have aimed to make it work
with all Unix variants.
Ray Dassen <firstname.lastname@example.org>