Someone has apparantly began participating on a list I manage who uses MS
Exchange. I have no experience with MS Exchange at all, but from what I
have been told, that person is requesting a notification for each of his
messages that have been read and other subscribers who also use Exchange
are unwhittingly generating those notifications to the list.  Is there any
way I can filter out these notification message requests from incoming
mail to my list? If so, how?