How to Add an Outgoing SMTP Mail Address to Microsoft Outlook

I have my email account configured on my laptop and when I'm at home, I use my Internet connection at home via WiFi to my router. When I'm on the road, I use my wireless 3G card. The issue is that when I use it at home, in order to send emails, I need to set the SMTP server settings to my "home provider" and when I'm on the road, I need to set it to my "3G provider". This is quite cumbersome. Can I configure my mail account with 2 SMTP servers so that I don't have to change it all the time?
Tags: Microsoft, Outlook, Exchange, howto, how to, FAQ, add-ins, Outlook 2016, Outlook 2013, Outlook 2010, Outlook 2007, Outlook 2003, Outlook 2002, XP, mail, e-mail, email, message