Can't you set the distribution list to only accept messages from authenticated users? Mark Shevill IMG Messaging Technical Lead Shell Information Technology International Limited Rowlandsway, Wythenshawe, Manchester M22 5SB, United Kingdom Tel: +44 161 935 7152 Fax: +44 207934 1630 Email: Mark.M.Shevill@xxxxxxxxx Internet: http://www.shell.com -----Original Message----- From: Mark Budman [mailto:mbudman@xxxxxxxxxxxx] Sent: 12 February 2003 23:08 To: [ExchangeList] Subject: [exchangelist] Distribution Lists http://www.MSExchange.org/ Is there a way to prevent distribution lists from accepting emails that is external (not part of the domain)? For instance, my domain is xyz.com. Only users who are part of xyz.com are allowed to send email to distribution lists at xyz.com. The distribution lists will reject email from all other sources. We are running Exchange 2000 enterprise edition. Regards, Mark ------------------------------------ Mark Budman Systems Engineer Devry College of Technology 5860 Chedworth Way Mississauga, ON L5R 3W3 mbudman@xxxxxxxxxxxx (905) 502-5193x6235 / (800) 249-5777 ------------------------------------ ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp Exchange FAQ: http://www.msexchange.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: Mark.Shevill@xxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')