Autoroute SMTP - Navigation System

It's fascinating to follow the packets from the web sites you visit on their way out of a server farm, around the world, and into your home.
If you travel around the world, too, and have to switch internet service providers frequently, here's a way to solve some outgoing mail problems automatically:
Autoroute SMTP is a nifty utility that lets you switch network connections and ISPs without having to change the outgoing mail server settings in your email client. (Windows)