You can add those other two accounts to your outlook profile, just set the send receive settings to not receive just send. Then when you get a new email you can reply, and chose the account you want it to be sent from. You will need to find out the smtp address for the pop account setup of the other two accounts, because you when you send from those account your Outlook will relay through those servers instead of your GoDaddy account.
Hope that made sense, it will work though, to recap, add your two other email addresses as additional pop accounts. Then in Outlook change the Send Receive settings, (usually under define send receive groups), to only send, not recieve, that way you dont have to worry about pulling duplicate emails. THEN, in every new or reply or forward email, you will see an option to choose Account this will allow you to choose who you want to send from.