As Alumni of the University, you're entitled to a free
alumni mailbox. However if you wish NOT to own one, the Alumni E-mail Forwarding Service (AAEFS) provides a free service for all alumni of NTU to maintain a permanent email address with the University.
No mailbox or network account will be issued to you for this forwarding service.
When you register for AAEFS, you specify an alias to be used as your permanent email address. AAEFS will automatically redirect all email posted to you at AAEFS to your personal ISP or company e-mail address, etc.
For example, all email to "james-bond@pmail.ntu.edu.sg" (permanent email address at AAEFS) will be redirected to "james-bond@yahoo.com" (personal email address).
Check out how to apply for this proxy e-mail address here.