[Mailman-Users] multiple lists, same message, avoid sending to same users on different lists

[Jon Carnes]

On Tue, 2003-04-29 at 16:22, Adam Lipson wrote:
> I am going to be hosting a few discussion lists that may have members that are the same across the lists.  Is there any mechanism that will allow me to send a message to a few or all of the lists and the members that are on multiple lists only receive one message regardless of the number of lists they are on.  IE we don't want to be a Spammer :)
> 
> Thanks,
> Adam
> 
A simple way of doing this is to use one of the scripts in the FAQ and
create a site-wide list that contains all users of all lists

http://www.python.org/cgi-bin/faqw-mm.py?req=show&file=faq03.005.htp