Yup, we do this all the time - get at your pop3 email from home, at the cabin, when on vacation, etc. Works 100% great on laptops, but not as pratical for desktop systems. On a laptop you don't have to remember what email message is on what computer. This is an issue with using more than 1 desktop. If you don't get very many emails, then the desktop remembering what is where probably is not an issue.
Step #1 - Use dial up, wifi, etc. to get on the internet first.
Stetp #2 - Send and receive your pop3 email.
If you have the particular computer you are using setup with the correct pop3email configurations you can get at your email from that computer that is on the internet from anywhere in the world. The choice is yours if you want to get at your email from a web browser, or through pop3. There are some limitations of course, but for the most part, it works either way.
Bottom line however is your email is safe, assuming nobody else knows your password. The only reason Formula Jr. got both his and the girlfriend's email to work on 1 computer was the fact he new both accounts' names, settings, passwords, etc. A little light bulb should be going off, Hmmmm maybe that's why changing passwords from time to time is a good idea.
Tuco: When you have to shoot, shoot, don't talk.