Outlook 2003 “On Behalf Of”

I have an exchange account and a pop3 account in my outlook 2003…Can anyone tell me how to take out the “On Behalf Of” that appears in bold in the from addreese when i fwd email using my pop3 connection.

From: Jon Doe [mailto:jdoe@mail.com] On Behalf Of Jon Doe
Sent: Thursday, September 14, 2006 11:06 AM