Unable to deliver the message due to a communications failure

[ppatti]

Hi everyone,

I get a bounce back that says "Unable to deliver the message due to a communications failure" error 550, when I send mail to a certain domain from my Exchange Server 5.5. I never this problem send mail to them previously. I can send mail to that same address when I send from my Yahoo account.

Any Suggestions?
Thanks

 

[Zelandakh]

Probably a DNS issue?

Resolve the name to its IP address and manually put that entry into your local DNS server.

See if that cures it.