If you have an account on the math server you can:

Make a secure shell connection over the web using MindTerm
or
SquirrelMail based interface to access your math mail (Obsolete)
or
Use a SSH client to connect to math.cudenver.edu.
Download and install a windows SSH client.
Search Google for SSHSecureShellClient-3.2.9.exe
See http://ssh.com for details.