Hi,
Menu - add account, enter name, email, password.
Press Manual.
On the Incoming screen, choose POP3 as the server type (near the top).
Enter incoming.xplornet.com for server name, choose "Not encrypted" for "Security type", the port will change to 110.
Press Next to go to outgoing server screen.
There, enter smtp.xplornet.com for server name, choose "Not encrypted" for "Security type", the port will change to 587.
Press Next to validate these settings.
BTW -- 1 -- I just tried connecting to these servers, obviously I don't have an account, but just the server names and ports appear correct.
BTW -- 2 -- Using "SSL (accept any)" for Security Type should work for both of these servers, too. The ports will change to 995 / 465 respectively.