Here's a possibility. Try checking your Outlook to ensure that you're leaving a copy of messages on the server. Outlook configures POP accounts to remove the messages from the server by default. If this is the case it's possible that your Outlook is removing messages from the mail server before BIS can grab a copy of them.
Just a couple of things while I'm thinking about it.
pophm.sympatico.ca is the correct incoming server. You do not need the smtphm.sympatico.ca server for BIS. It sends using the BIS SMTP servers.
BIS very likely autoconfigured for SSL if it gave you back a valid check mark. BIS would have to actually login to the account to validate and you can't even connect to the mail server on port 110 to input a user/pass combo.
MX records indicate valid servers for incoming mail. I send from my machine to
and the MX records show mailservers that accept mail for that domain with a preference level, in this case they all have the same preference level 5. You shouldn't be able to connect to them for POP service as well in a mail environment as huge as Sympatico would have. A small company or ISP may have their incoming and outgoing SMTP doubled along with POP, IMAP and anything else they can throw at it. I can't imagine Sympatico doing the same.