Hi all, I have exch2k7 std and am having aNonExistentDomain errorwith a certainexternal domain. Sending an email to this domain generates the error below. The recipient is also unable to send to us. The recipient address works fine from a yahoo mail account. The problem is restricted to this domain only. Any suggestions? Thanks. Delivery has failed to these recipients or distribution lists: thastings@gulfshoreassembies.comA problem occurred during the delivery of this message. Microsoft Exchange will not try to redeliver this message for you. Please try resending this message later, or provide the following diagnostic text to your system administrator. _____ Sent by Microsoft Exchange Server 2007 Diagnostic information for administrators: Generating server: spsmail.simcoeparts.com thastings@gulfshoreassembies.com#554 5.4.4 SMTPSEND.DNS.NonExistentDomain; nonexistent domain ## Original message headers: Received: from spsmail.simcoeparts.com ([192.168.0.3]) byspsmail.simcoeparts.com ([192.168.0.3]) with mapi; Fri, 13 Jun 2008 09:57:21-0400From:Administrator <administrator@simcoeparts.com>To: "thastings@gulfshoreassembies.com" <thastings@gulfshoreassembies.com>Date: Fri, 13 Jun 2008 09:57:20 -0400Subject: FW: testThread-Topic: testThread-Index: AcjNVqtRIeum3877QkS+d/7Vrumk9AABrVdwMessage-ID: <537C9125CDD79548B39C42A963B9135C6027957253@spsmail.simcoeparts.com>Accept-Language: en-USContent-Language: en-USX-MS-Has-Attach:X-MS-TNEF-Correlator:acceptlanguage: en-USContent-Type: multipart/alternative;boundary="_000_537C9125CDD79548B39C42A963B9135C6027957253spsmailsimcoe_"MIME-Version: 1.0

Found the problem. After looking at the recipient domain name for about the fifth time, the domain name is mispelled. Sheesh!! I sheepishly wear the bad admin of the day award...