The Messaging Server supports the use of Secure Socket Layer (SSL) for the Internet link between it and Communications Express Mail. Once you have set up Messaging Server for SSL, configure Communications Express for SSL See Sun Java System Communications Express 6.3 Administration Guide. A Communications Express Mail user specifies the Communications Express URL in their browser with the HTTPS protocol:
instead of the HTTP protocol (HTTP://hostname.domain:unsecure_port). When the Communications Express login window displays, the user sees a lock icon in a locked position at the bottom of their window to indicate they have a secure link.
See 23.5 Configuring Encryption and Certificate-Based Authentication for SSL configuration information for Messaging Server.