For mail within the unix environment, we recommend pine. Pine uses a menu system for reading and sending mail, possible commands are listed at the bottom of the screen, and pine has detailed on line help. Type "pine" or "/usr/local/bin/pine". 

Another option is to use webmail at http://webmail.oregonstate.edu 
And, of course, you can use any other secure IMAP compliant mail client in unix or windows.