I'd ask IT about it...my email is the campus key one; I couldn't access it with the first.last name way. I received an email about Login Information and got both sides of it.
"The Campus Key is used to authenticate your identity and grant you access to TJU computing services, such as Blackboard, the JeffMail email system..."
"Your Jefferson e-mail address is easy to remember. The address is generally represented as
[email protected]."
Hope you get it figured out so you can join the group! Btw, my shirt came in today