Test a POP3 Connection (Telnet)

I often find myself needing to be able to check a username and password combination for somebodies email connection (normally because they have forgotten their password - again!). A really quick and easy way to do this is using telnet. Here's the easiest way to do it, from the DOS/command prompt:

> telnet mail.mydomain.com
> user my_user_name
> pass my_password

At this point, if all is good, you will have made a successful connection. Show all messages as a list using:

> list

If you want to see the contents of a specific mail then use:

> retr mail_item_number

If you leave the connection with no activity then it close the connection itself, but preferably use:

> quit

There are some more telnet commands here. Also, if you using an IP address, you may well have to use a port number (usually 110). e.g. 123.123.123.123 110