HP Email Firewall Appliance manual Features, 3Com Email Firewall

14CHAPTER 1: 3COM EMAIL FIREWALL OVERVIEW

Installation For detailed information on installation, see the Installation Guide that came with your 3Com Email Firewall.

Features	The following sections provide an overview of the main features of the
	3Com Email Firewall.

Anti-SpamThe 3Com Email Firewall contains a variety of powerful features to prevent spam messages, including the following:

■Server-based tools such as DCC (Distributed Checksum Clearinghouse), STA (Statistical Token Analysis), Objectionable Content Filtering, and Pattern Based Message Filtering that prevent spam messages from being delivered to an end user’s mailbox.

■User-based tools for managing quarantined spam and building trusted senders lists for whitelisting.

Anti-Virus Scanning The 3Com Email Firewall provides a built-in virus scanning service. When enabled, all messages (inbound and outbound) passing through the 3Com Email Firewall are scanned for viruses.

Viruses can be selectively blocked depending on whether they are found in inbound or outbound messages. Message attachments are recursively disassembled to help ensure that viruses cannot be concealed.

Malformed Email Many viruses try to elude virus scanners by concealing themselves in Checks malformed messages. The scan engines cannot detect the attachment

and pass the complete message through to an internal server.

Some mail clients try to rebuild malformed messages and may rebuild or activate a virus-infected attachment. Other types of malformed messages are designed to attack mail servers directly. These types of messages are often used in denial-of-service (DoS) attacks.

The 3Com Email Firewall analyzes each message with very extensive integrity checks. Malformed messages are quarantined if they cannot be processed.