Hi 

I'm Mohamed Ahmed Kamal  (IT engineer)

We use live mail server in our company 
 let me explain our problem 

when i send any email from any account in our domain to any person .
my email address appear like that

From: *** Email address is removed for privacy *** on behalf of it hospius (it@-------.com)
Sent: Friday, October 25, 2013 2:36:27 PM
To: it --------(it@------.com


and this is for all accounts on this domain
why this strange address?
But i setup many domains on live mail server and there is no problem like that so i need your advice about that ASAP

please i need fix this problem finally