When you open the email client, your screen will look like this:
Navigate to File>Network configuration... and enter your email address.
Now switch to the Receiving(POP3) tab to add an incoming server.
and click Add...
then click New... and fill in the server info.
User name should be your full email address!
Navigate to the Security tab and make sure SSL is not enabled. This will be disabled by default. Click OK, then select the server you just created.
Now navigate to the Sending(SMTP) tab and click Add...
Then click New...
Enter the server info:
Now select the Security tab and check the Login to the SMTP server using a POP3 username/password box.
Select the pop3 server you already created.
Click OK. Select the server you just created. Click OK again. Now make sure you can send and receive mail.