When you run nslookup and set the type to mx from your exchange server, do you get this result? > set type=mx > yahoo.com Server: cns.s3woodstock.ga.atlanta.comcast.net Address: 68.87.68.162 Non-authoritative answer: yahoo.com MX preference = 1, mail exchanger = mx1.mail.yahoo.com yahoo.com MX preference = 1, mail exchanger = mx2.mail.yahoo.com yahoo.com MX preference = 1, mail exchanger = mx3.mail.yahoo.com yahoo.com MX preference = 5, mail exchanger = mx4.mail.yahoo.com mx2.mail.yahoo.com internet address = 4.79.181.12 mx2.mail.yahoo.com internet address = 67.28.114.35 mx2.mail.yahoo.com internet address = 67.28.114.36 mx2.mail.yahoo.com internet address = 4.79.181.13 mx3.mail.yahoo.com internet address = 64.156.215.18 mx3.mail.yahoo.com internet address = 67.28.113.19 mx3.mail.yahoo.com internet address = 64.156.215.5 mx3.mail.yahoo.com internet address = 64.156.215.6 mx3.mail.yahoo.com internet address = 64.156.215.8 mx4.mail.yahoo.com internet address = 68.142.202.11 mx4.mail.yahoo.com internet address = 68.142.202.12 mx4.mail.yahoo.com internet address = 66.218.86.156 mx1.mail.yahoo.com internet address = 67.28.113.11 mx1.mail.yahoo.com internet address = 4.79.181.14 mx1.mail.yahoo.com internet address = 4.79.181.15 mx1.mail.yahoo.com internet address = 67.28.113.10 > -----Original Message----- From: Bernard Gabriel [mailto:bernard.gabriel@xxxxxxxxx] Sent: Tuesday, December 13, 2005 9:29 PM To: [ExchangeList] Subject: [exchangelist] MS Exchange 5.5 http://www.MSExchange.org/ Hello! Can anyone help me about my MS Exchange server 5.5 I'm using the Outlook Express sending emails is fine and Receiving from other domain site, but the only problem is Yahoo email cannot send. I dont now what is the problem. It returns me a message of; did not reach the following recipient(s): Bernard email yahoo on Wed, 14 Dec 2005 09:49:18 +0800 The recipient was unavailable to take delivery of the message The MTS-ID of the original message is: c=US;a= ;p=PPNBD;l=SCSRVR0512140143YZ6C1QMH Please help me.. Thank you.. ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Exchange Newsletters: http://www.msexchange.org/pages/newsletter.asp ------------------------------------------------------ Visit TechGenix.com for more information about our other sites: http://www.techgenix.com ------------------------------------------------------ You are currently subscribed to this MSExchange.org Discussion List as: mjtech@xxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=exchangelist Report abuse to info@xxxxxxxxxxxxxx