Yes, I can ping the returned mx records. Exchange says host unreachable, but i think it delivers the message. because the other side said that they got the same mail eight times. But i can see the mail waiting in the queue with "host unreachable" reason and may be it is sending again. what can i do? is there a communication problem with my server and other servers? -----Original Message----- From: Technical Support [mailto:tech@xxxxxxxxxxxxxxxxxx] Sent: Friday, January 17, 2003 6:55 PM To: [ExchangeList] Subject: [exchangelist] Re: Exchange 5.5 Question http://www.MSExchange.org/ Have you then tried to ping the returned mx records? NSLOOKUP returns say mail.mydomain.com so everything looks ok but does ping mail.mydomain.com first resolve to an ip address and secondly get a response? Just a thought Frustrated Admin ----- Original Message ----- From: Meral <mailto:MeralK@xxxxxxxxxxxx> KESKINER To: [ExchangeList] <mailto:exchangelist@xxxxxxxxxxxxx> Sent: Friday, January 17, 2003 4:46 PM Subject: [exchangelist] Exchange 5.5 Question http://www.MSExchange.org/ <http://www.MSExchange.org/> Hello All, We have Exchange 5.5 SP4 on Windows NT 4.0 with SP 6a. When I check Internet Mail Service Queue, I see that some of messages remain and when I check the details, it says "host unreachable" althoug our DNS works properly. I checked it with nslookup on mail server ant it returns the mx records of these "unreachable" domains. Any idea? Nortel Networks Netas 35 years in communications ------------------------------------------------------ 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: tech@xxxxxxxxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') ------------------------------------------------------ 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: meralk@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub') Nortel Networks Netas 35 years in communications