To configure your Windows Mobile 6 device for a non Exchange email account:

Open Messaging (Start | Programs | Messaging)
Select Setup E-mail

Enter your email address in E-mail address:
Enter your password in Password:

Click Next

Uncheck "Try to get e-mail settings automatically from the Internet"

Click Next

Pull down "Internet e-mail" from the setting Your e-mail provider:

Click Next

Enter you full name in Your name:

Account display name: should read your domain. You can leave this as is or name it whatever you like.

Click Next

Enter your incoming mail domain in Incoming mail server:
        Your mail domain is your domain name with mail. in front. For example sbwh.com would be mail.sbwh.com
Account type: is POP3

Click Next

Enter your full email address (not an alias) in User name:
Enter your password in Password:
Select Save Password

Click Next

Select your outgoing mail domain in Outgoing (SMTP) mail server:
        Your mail domain is your domain name with mail. in front. For example sbwh.com would be mail.sbwh.com
Check Outgoing server requires authentication
Leave everything else checked

Click Next

Adjust Automatic Send/Receive: to your own preferences

Click Finish