Yes, to do this you must change the server ports to the following:
SSL incoming mail port (POP3): 995
SSL incoming mail port (IMAP): 993
SSL outgoing mail port (SMTP): 465
In all cases the connection to the server must be to: mail.yourdomain.com
Replacing yourdomain.com with the real one.
Also be sure to tell your email client that the connection will be used via SSL.