It's probably an X.400 issue. When the recipient doesn't receive the message, do you or the sender receive an NDR or other error? Test it by enabling email tracking and find out where it stops. Also, look at the address (within outlook), that doesn't make it to the recipient. Look at the properties of it for the X.400 address. Does it match your organization's X.400? -----Original Message----- From: Dêniz Feital (Chiptek) [mailto:dfeital@xxxxxxxxxxxxx] Sent: Monday, July 05, 2004 10:07 AM To: [ExchangeList] Subject: [exchangelist] How many custom recipients an Exchange Server 5.5 may have? http://www.MSExchange.org/ Hello my friends. I am here with a question. I just imported a custom recipient list in my Exchange 5.5 Organization few weeks ago. The list had about 16.000 custom recipients (internet mail). Some few users reported that sometimes they send a message and it simply is not delivered to the recipient (which is actually one of those custom recipients). I have never had this kind of problem, but since I did the import some users started bothering me about it. Does anyone has a clue about it? Since I didnt change a thing in my Exchange, I suspect this large numbers of custom recipients might be an issue. Thank You. My best regards. > Dêniz Feital > GIC - Chiptek / Vésper > Tel 55 11 2121-6430 > > > ------------------------------------------------------ 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 ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 ISA Server Resource Site: http://www.isaserver.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this MSEXchange.org Discussion List as: JaredsJazz@xxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist