How to email using a program on your own computer (like Outlook Express, Eudora...)

I assume that you know how to use your program.
So I will just list the settings you need to enter into your program here.

You want to set up the account to use a POP3 server to get/download your email.
Enter your normal username and password.
Enter your email address as your watnik.com email address (user@watnik.com)
The incoming mail server (POP3) is just watnik.com
The outgoing mail server (SMTP) is whatever your ISP tells you.
- Since I currently use PacBell/SBC/Yahoo! DSL my SMTP is smtp.sbcglobal.yahoo.com