If you are setting up your email account on an iPhone or iPad then have a look at the video below. It will go through a step-by-step process...

Some important things to know:

Incoming and outgoing mail server entries are mail.yourdomain.com
where "yourdomain.com" is your actual domain

The address (our account) equals your full email address that you want to set up.
Ie, your@yourdomain.com
where "your@yourdomain.com" is your actual full email addressyour@yourdomain.com">