Our default (system-generated) MX records route via our Spam filters, and is specific for each shared host.
You can also use generic routing, which would look something like this:
spe.ucebox.co.za (Gallo Manor Data Centre)
spe1.spambox.co.za (Bryanston Data Cetnre)
You can also point MX records directly to the server IP, but you could get SPAM (and a lot of it). But you can also configure more advanced Spam features in cPanel, like Spam Assassin.
If you're not sure, drop our team an email so we can advise you on the best course.