Netvibes widget: has anyone tried this with success?

Netvibes widget: has anyone tried this with success?

I tried this morning, and failed repeatedly, to define a pop3 widget to display Zoho mail as a widget on my Netvibes start page. I tried both secure and unsecure ports, providing the server name as pop.zoho.com. For what it's worth, the browser I was using at the time was Webkit on my MacBook Pro. I think, however, this should have had no effect.

By comparison, I have been able to define widgets for several other mail services, including that of my own ISP. Is it, perhaps, that Zoho does not support this manner of communication?