Enabling Additional Exchange Services for Front-End Servers
If you performed the procedures properly up to this point, you should have successfully hardened your Exchange front-end servers. However, to take advantage of Exchange 2003 services and features, you must enable protocol support for each type of client. This section explains which services you must enable to support the client protocols.
Important
For POP3 and IMAP4 to function, you must configure both protocols on the front-end and the back-end servers.
Each of the following subsections corresponds to a specific security template included in the Exchange Group policy Security Templates. Installing these templates is the most efficient way to enable a protocol.