Symantec 10490452 Administration Guide - Page 240

240 Glossary Email Firewall A set of features of Symantec Mail Security for SMTP that provide perimeter defense, similar to a regular firewall, focused on email traffic. The Email Firewall analyzes incoming SMTP connections and enables preemptive responses and actions before messages progress further in the filtering process. The Email Firewall provides attack preemption for spam, virus, and directory harvest attacks, and sender blocks based on IP address, domain, third party lists, or Symantec lists. email server An application that controls the distribution and storage of email messages. encrypted attachment A message attachment that has been converted into a form that is not easily understood by unauthorized persons. Symantec Mail Security for SMTP does not scan encrypted attachments, but allows you to choose an action to take when an encrypted attachment is detected. Ethernet A local area network (LAN) protocol developed by Xerox Corporation in cooperation with DEC and Intel in 1976. Ethernet uses a bus or star topology and supports data transfer rates of 100 Mbps. Expunger A component of Spam Quarantine, which resides on the Control Center computer in Symantec Mail Security for SMTP. Expunger can be configured to periodically remove older or unwanted messages from the Spam Quarantine database. extension A suffix consisting of a period followed by several letters at the end of a file that, by convention, indicates the type of the file. false positive A piece of legitimate email that is mistaken for spam and classified as spam by Symantec Mail Security for SMTP. filter A method for analyzing email messages, used to determine what action to take on each message. Symantec Mail Security for SMTP uses a variety of types of filters to process messages. A filter can be provided by Symantec, created by a local administrator, created by an end user, or provided by a third party. Filtering Engine A component of a Symantec Mail Security for SMTP Scanner that performs message filtering. Filtering Hub A component of a Symantec Mail Security for SMTP Scanner that manages message filtering processes. filter policy In Symantec Mail Security for SMTP, a set of actions that apply to a category of messages. The actions specified in a filter policy are only applied to users who are members of a Group Policy that includes the filter policy. There are three types of filter policies: spam, virus, and content compliance policies. Filter policies can also make use of policy resources. See also Group Policy, policy resources. firewall A program that protects the resources of one network from users from other networks. Typically, an enterprise with an intranet that allows its workers access to the wider Internet will want a firewall to prevent outsiders from accessing its own private data resources. See also Email Firewall.