Multiple Email Domain with respective source header

Hi,

We have Exchange 2013 CAS and MBX separate server with two Email domains @abc.com and @xyz.com, functioning properly.

Issue: when user@abc.com send mail, in the recipient side source header is showing  as "Received: from 127.0.0.1  (EHLO xyz.com) (10.10.10.2)" or "Received: from 127.0.0.1  (EHLO abc.com) (10.10.10.2)" .

Requirement: When user@abc.com send mail, recipient should send only source header information respective to the domain name as "Received: from 127.0.0.1  (EHLO abc.com) (10.10.10.2)"

How can i achieve this?

Thanks

Alagar