I recommend to change your password at least once a month. To do so, please do the following:
1. Click Mail
2. Click Add/Remove/Manage Accounts
3. Click the Password button to the right of an email address for which you would like to change the email password for.
4. In the box to the right of “New Password:” Type the new password for the email address
5. Click Change button
You have now successfully changed your email password.