Seems like a DNS problem. Have you tried to NSLOOKUP the MX records of the target domains from the console of your Exchange server?
How about comparing your NSLOOKUP results with those from www.dnsreport.com? (or www.network-tools.com) If there is a discrepancy, then probably the DNS server(s) that are you using are not up to date? -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of MSX Mailing List Sent: Wednesday, December 20, 2006 4:42 AM To: Exchange Discussions Subject: Mail Bouncing Backing if send to any domain.co.nz From Ms Exchange 5.5 Dear All WE have an issue if we send any e-mails to any domain.co.nz from our Ms Exchange 5.5 (SP4) it bounces back with the below error. All help will be appreciated. Thanks Nathan '[EMAIL PROTECTED]' on 4/12/2006 3:23 PM Unable to deliver the message due to a communications failure The MTS-ID of the original message is: c=US;a= ;p-061204022253Z-2359 MSEXCH:IMS: 3902 (000B09AA) Host Unknown _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange To subscribe: http://e-newsletters.internet.com/discussionlists.html/ To unsubscribe send a blank email to [EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/read/?forum=exchange To subscribe: http://e-newsletters.internet.com/discussionlists.html/ To unsubscribe send a blank email to [EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] To unsubscribe via postal mail, please contact us at: Jupitermedia Corp. Attn: Discussion List Management 475 Park Avenue South New York, NY 10016 Please include the email address which you have been contacted with.
