Unco ursa bearmail
I think I see what you're trying to do!
You're trying to create a pun by combining "unco" (meaning "unusual" or "uncommon"), "ursa" (meaning "bear" in Latin), and "bearmail" (a playful combination of "bear" and "email").
If I'm correct, the pun would be: "Unco Ursa BearMail" - which is a clever and humorous way to refer to an unusual or uncommon bear-themed email service!
Am I right?