SSL, Personal email certificates
Personal SSL certs and signed/encrypted email are not supported at this time. Those using them are generally creating PGP public/private keypairs and managing them personally.
How are people on campus getting them? Is there a 3rd party vendor?
GpgOL plugin with Outlook to sign/encrypt email others use
Enigmail with Thunderbird
Again, none of this is supported by IT Pros or by email admins so people are on their own as far as support.