If you're a Thunderbird or Firefox user and have ever allowed them to save your password, you might want to think again. Try this...

1. In Thunderbird go to the Thunderbird→Preferences... (Mac) or Tools→Options... (Windows) menu.
2. Click on the "Security" icon.
3. Click on "Passwords."
4. Click on "Show Passwords."
5. Click "Yes" to confirm.

If what you see is a list of passwords, please click "Remove All." It will mean that you have to enter your password for sending and receiving mail once per each Thunderbird session, but it's worth it. Just think: Not only can anyone who sits down at your computer log into your email, they can see, in plain text, what your password is. Enough said?

Now that you've removed your saved passwords from Thunderbird, do the same thing with Firefox. Please.