You might want to check and make sure that the second server (?) is allowed to relay off the first server. Even though you configure the first server as the gateway, you will need to tell it to allow relay from the second server. -----Original Message----- From: Fush Grubber [mailto:fgrubber@xxxxxxxxxxx] Sent: Tuesday, February 01, 2005 5:35 AM To: [ExchangeList] Subject: [exchangelist] Problems with sending mails out from a second Exch2k box http://www.MSExchange.org/ Hi all, i have a slight problem here. I have two exchange servers in my organisation. On the first server i can send and receive mail both to internal receipients and to external recipients without any problem On the second server, i have configured the IP address of the first server to be a smart host to the second server, hence all mails going out of the domain are meant to send mails out via the first server on the second server i can send and receive mails to internal recipients without any problem, but when i send mails to recipients outside the domain i get an NDR #5.7.1 error, i have checked my configuration but cannot find anything wrong funny enough i can receive mails sent from the internet to this recipient could anyone please help with this problem _________________________________________________________________ Express yourself instantly with MSN Messenger! Download today it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ ------------------------------------------------------ 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: swillis@xxxxxxxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to listadmin@xxxxxxxxxxxxxx