email sender

Hi guys and girls

Quick question when my site http://www.motortrader-insurance.com send out emails they are sent from the follwoing

“[email protected]; on behalf of; One Bear Media [[email protected]]”

i would like it to read “[email protected]” or simply “One Bear Media”

Is there anything i can change or do i need a plug in?

oh i also use visual form builder pro not sure if that makes a diffrence??

Thanks for the help in advance

Jon