Cant receive External email

Dear all,

I followed "The Perfect Server - CentOS 5.3 x86_64"

Everythings work perfect, except that I cant receive email from external.

when trying to send email from Gmail to mydomain email, I got:

The error that the other server returned was: 550 550 #5.1.0 Address rejected [email protected]

As I disabled the firewall, ports shall not be blocked.

Any hints
or where to look for the error for email receiving.

Thanks
Levin

 

I have solved it, thanks for reading.

Need to add my server to DNS MX record.