With S/MIME, senders can encrypt messages prior to sending them. The recipients can store the encrypted messages after receipt, decrypting them only to read them.
Communications Express Mail now includes the security advantages of S/MIME. Communications Express Mail users who are set up to use S/MIME can exchange signed or encrypted messages with other Communications Express Mail users, and with users of the Microsoft Outlook mail system or other mail clients that support S/MIME. See Requirements for Using S/MIME with Communications Express Mail in Sun Java Communications Suite 5 Installation Guide for more information.
For other clients that support S/MIME, see that client documentation for information on S/MIME configuration.