Pop Creative use Rackspace to provide our email service. The general details you'll need to setup are the server details, which are:
Incoming Server: secure.emailsrvr.com
Outing Server: secure.emailsrvr.com
Rackspace have recently launched a new, personalised setup tool at https://emailhelp.rackspace.com/
If you login to that page with the credentials you receive from Pop Creative, it gives you a visual step-by-step guide on how to setup the emails on a variety of devices and applications.