LISTSERV distributes email. Email clients and server descriptions are the places to look for that kind of advice. SPAM is another issue. Please see: FAQ -- http://WWW.CLAWS-AND-PAWS.COM/spam-l/ Security of your LISTSERV(R) distribution list is addressed in the appendix: http://www.lsoft.com/manuals/1.8d/owner/appendb.html#keySecurity /Pete