When you run the software for the first time, it should come up with the following "New Account" window. Otherwise, you need to go to Menu > Tools > Accounts and click on the "+" (Add new account) button located at bottom left.
Select Mail > Other
Click next and enter your email address
- Select POP3.
- Incoming server is using the mail subdomain. If your domain is example.com, then the incoming mail server will be mail.example.com.
- User name is your full email address and password is your email password.
- Click Next
Outgoing server, user name and password are the same with the settings in Incoming Server. Do not tick the "Outgoing server doesn't require authentication" option.
Click ignore test results and click next.
Enter your name and account name. Both can be anything. It's up to you. Click next.
Select "Create separate folder tree for messages" and click Finish.
Go to POP3 tab. For Security policy, select "Don't use secure connection". You can change the options under "Server settings" if you wish but DON'T UNTICK the "Remove from server after X days" option otherwise you will use up the allocated storage quota for your mailbox.
Go to SMTP tab and change the Port number to 587 and Security policy to "Don't use secure connection".
Click OK and you are done!