Here is how to do this, explained in simple words:
1. Click on the “Start” button on your desktop.
2. Click on the “Run” option in the “Start” menu.
3. In the text box next to “Open” type “cmd” (for Win XP or Win 2000 Pro), or “command” (for Win 95, Win 98, Win ME, Win NT 4.0).
4. Press “Enter” or click “OK”.
5. The “command prompt” window will open on the screen.
6. In this window type “telnet ‘YourIncomingServer’* 110”.
7. Press “Enter”
8. You should get “+OK InterMail POP3 server ready.” or a similar message.
9. You will have to type word “user”, press the space bar on the keyboard one time and type your “user name”**
10. Press “Enter”
11. You should get “+OK please send PASS command”.
12. Now type the word “pass”, press the space bar on the keyboard one time and type your “password”***
13. You will get “+OK ‘user name’ is welcome here”. Now you are logged on to your POP3 server through telnet.
Now you should be able to type "list" in the same window. This will display the number of the messages in your mailbox and their individual size.
* - ‘YourIncomingServer’ - the name of your incoming mail server will be provided to you by your Internet Service Provider. For example - if you are a customer of Cox Communications your incoming mail sever could be ' pop.west.cox.net '; if you are a customer of Earthlink, you mail server could be ' pop.earthlink.net'. To obtain the correct name of your incoming mail server, please call your ISP's technical support line.
....... to be continued