Step 1:

Enter your email address and password.

Then click on the Manual Setup button.

Step 2:
Click on the POP3 Account button

Step 3:

Your User name needs to be your full email address

The POP3 server needs to be: mail.yourdomain.com

Then click on the Next button at the bottom

Step 4:

Your outgoing server settings should already be correct

SSL is Off (NONE)

Incoming Port: 110 (if that does not work try: 145)
Outgoing Port: 25 (if that does not work try: 2525)

Click on the Next button at the bottom

Step 5:

The default account options are fine, you can change them if you wish

Click on the Next button at the bottom

Step 6:

Update your name, that is the name people will see when they receive an email from you

Click on the Done button at the bottom