If you are interested in the convenience of your users, why not use 
passive probes?  The users never see them!

cheers, wayne

Patrick von der Hagen wrote, in part,  on 9/14/2005 6:05 AM:

>and active probes happen once a month for each list, you get ten probes,
>while mailman would send one monthly-reminder for all lists on the given
>server, which my users consider to be much more convenient)
>