I am having some trouble sending email to a .mil address. The error code that it returns is The destination server for this recipient could not be found in Domain Name Service (DNS). Please verify the email address and retry. If that fails, contact your administrator. xxxx#5.4.0

Do your own check. NSLOOKUP set type=MX whatever.mil Does it resolve? Does your Exchange server send directly to recipient domains or does it use a smart host? -- Ed Crowley MVP "There are seldom good technological solutions to behavioral problems." . "nvbruin" wrote in message news:6473c0ea-2d34-4902-b06b-f042a5c0a0e0... I am having some trouble sending email to a .mil address. The error code that it returns is The destination server for this recipient could not be found in Domain Name Service (DNS). Please verify the email address and retry. If that fails, contact your administrator. xxxx#5.4.0 Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hello nvbruin, Please check whether DNS server is able to resolve the XXX.mil domain or not. Add the IP 4.2.2.2 on the Forwarder of the DNS server console. Go to CMD -- nslookup set q=mx xxx.mil If you DNS server is able to resolved the MX for .MIL domain. Then use the MX IP as smarthost and create a dedicated Send Connector or SMTP connector for the xxx.mil domain. Restart the SMTP on E2K3 OR Transport service on E2K7. It will fix the issue.MicroSoft Exchange Admin. & Connector EXCHANGE2010, MCSE, MCTS, MCSA MESSAGING, CCNA & GNIIT

Hi nvbruin, How about your question? Any updates? If you can resolved the MX, you can also try to telnet to test. XFOR: Telnet to Port 25 to Test SMTP Communication http://support.microsoft.com/kb/153119 Frank Wang

Hi nvbruin, Any updates?Frank Wang

Hi nvbruin, How about your question now? Any updates?Frank Wang