70-285 Designing a Microsoft Exchange Server 2003 Organization Training Course

Demo Question 7.

Answer: D

Explanation: E. mail is an essential service for nearly all organizations. Therefore, it is crucial that administrators provide their users with secure and reliable e-mail services. A malicious attack on the messaging system, in the form of a virus, worm, or denial of service, is a prominent area of risk in daily Exchange 2003 operations. Similarly, unsolicited commercial e-mail (spam) has become intrusive and sophisticated enough to be considered a threat to e-mail operations. Exchange Server 2003 includes a number of security features that can be used to reduce the amount of unwanted e-mail, including: * Support for Realtime Block Lists (RBLs). Allows Exchange Server to subscribe to Internet listing services identifying servers that are sources of spam on the Internet. Exchange Server blocks all messages from servers that are listed by the RBL provider. * Intelligent Message Filtering (IMF. . IMF is used by Exchange Server 2003 to perform server-side and client-side junk e-mail filtering by using Microsoft SmartScreen technology. Filtered messages can be archived so that they can be viewed by Exchange administrators or sent to the Outlook client's Junk E. Mail folder. IMF can be installed as a separate installation on Exchange servers that are not running SP2. IMF is installed by default when Service Pack 2 is installed. * Restricted relaying and submission. Allows administrators to restrict message relaying and message submission to a list of security principals, thereby protecting your organization against address spoofing. * Secure Web Client connection using Secure Sockets Layer (SSL). Exchange Server administrators can enforce certificate authentication for clients connecting to their mailboxes by using Outlook Web Access. Hypertext Transfer Protocol Secure (HTTPS) can also be used to secure connections from mobile clients such as mobile phones or wireless Microsoft ActiveSync(r) clients. * Support for Sender ID. Exchange Server 2003 SP2 supports Sender ID as an additional layer of message filtering. Sender ID verifies that every e-mail message originates from the Internet domain from which it claims to have been sent. This is accomplished by checking the address of the server sending the mail against a registered list of servers that the domain owner has authorized to send e-mail.