email

I would suggest checking your setting in webmail.  Particular look to see if you setup your email to be forwarded and deleted or if you recently setup any message filtering rules to try disabling/deleting those and see if you start receiving emails again.

I have received 6 of 104 messages as of yesterday, but the POP3 server is not responding.  Is this something I can fix?

Is your POP3 client reporting any sort of error message when trying to receive emails?

I'm not getting any email from either my cox.net (Outlook Express) or Cox webmail

If you're not receiving email in webmail check your settings there for any message filters, forwarding rules, allow and block senders.  I suggest removing any of those/resetting them to defaults and see if that helps.