I have a simple solution for her. Setup an account (or mail alias or
whatever) whom she subscribes to the list. This account then has a program
that reads the mail; shoves "FIREWALLS:" on to the front of the subject line
and forwards it to whomever at her site wants to read this list. She can
her mailer (which people tend to agree either stinks or is misconfigured),
she does not have to attempt to modify the behaviour of the rest of the
to meet her standards.
Kind of reminds me of the people who put "FORSALE:" on the front of their
in *.forsale newsgroups. Duh! (only makes sense if you are cross posting
group that you really shouldn't be cross posting to in the first place).