You have given me hope!  

I now have this message:

* Account 'xxxxxxr@ruggedinbox.com': Connecting to POP3 server: ruggedinbox.com...
*** SSL handshake failed
*** Connection failed.

I made sure the Use non-blocking SSL is unchecked.
Tried again and had the same issue.
I can login to this account via webmail, but not in claws.

What should I check next?

Thanks.