email server error
my company email server (email@example.com) using redhat 9 and postfix as a platform. I can send my e-mail and my - email can be receive by mail engine such as hotmail and lycos mail. But the problem is, when i reply my company email using yahoo mail, i got this error.
Delivery attempt history for your mail:
Thu, 4 Mar 2004 22:37:55 +0800 (SGT)
Failed MX lookup; try again later
But when i'm using hotmail, the email can be receive. why?