[Mailman-Users] List security

[Sean]

Hi,

I'm running a list on Mailman 2.1.3 and I am looking to secure my list as
much as possible.  I saw this in FAQ 3.11
(http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq03.011.htp):

  A more secure alternative is for your approved posters to add an
  Approved header to their postings as a header, or as the first line of
  the post).

I'd like to implement this but I'm uncertain to go about it.  I'm pretty
certain the content filtering options are where the test for the Approved
header should go.  My question is how can the header be added to the
posting?  Any insight or tips as to how this can be accomplished will be
appreciated.

Thanks,
Sean