it depends on which email server your service is on. if you are on smartmail, you can view your POP settings in the member zone page by clciking "Email client info".
If you are on cpanel, then follow the steps listed by zealot11.
I've had accounts with Doteasy and the email service was on one or the other. I called them up and they were nice enough to walk me through setting up my email accounts on my phone and my laptop. That's also how I knew about the two different email services (smartmail and cpanel).