Setting up your Gmail Account to have multiple 'sent from' Address

>  once in Gmail navigate to the 'Settings Gear' and click on 'settings'

> on the top menu that starts with 'General'  click on the 'Accounts and Import' tab.

> then click on 'Add another email address you own'  

>  then you'll need to add you email address you want to be able to send from .
* and choose whether you'll be sending as an alias

After you reply to the confirmation email , you'll be done. :)