Yes, goto their website.
However, now that you left your first answer, I think you should use IMAP, not POP.
Here's the difference: with POP, when you check your email, it goes from their servers to your computer, in a way that it is moved. It's no longer on their servers, just your computer.
IMAP means that you just read the mail on their servers, without moving it (but it can be copied as a backup).
With the latter, you can check your mail on one computer, then a few days later check it on your other computer, and still be able to find your old mail. If you keep using POP, then any mail you check on your desktop machine won't be available on your laptop.
It should be a very simple change (perhaps just changing server address in your settings from pop.homecall.com to imap.homecall.com, or whatever the address is). Homecall should offer both services, as it's nothing special.