I'm new to using Listserv and this particular group list. Does anyone have any ideas about solving mail relay problems using Listserv and Solaris Sendmail?? Inside domain addresses work great, outside addresses are rejected. I using a Solaris webserver, through a checkpoint firewall, into an NT mail server. trying to relay messages through the NT system. Is there a particular setting in sendmail that fixes this?? Scott Cassidy Unix Admin, Information Services Northwestern Memorial Hospital 312.926.1856 mailto:[log in to unmask] For more information on Northwestern Memorial Hospital, please visit our website at http://www.nmh.org