Symantec 11105111 User Guide - Page 90

90 Setting your antispam policy About antispam policy About antispam policy Your antispam policy is determined by how you configure Symantec Mail Security for SMTP to handle spam. Symantec Mail Security for SMTP can handle spam as follows: Real-time blacklisting Custom blacklisting Heuristic spam detection Custom spam rules List of mail servers from which mail is rejected List of sender email addresses and domains that are blocked Scan engine that uses an accuracy rating to detect spam Terms that, when found in messages, identify whether a message is spam You can also create custom and auto-generated whitelists to let Symantec Mail Security for SMTP bypass heuristic and blacklist processing for designated domains and email addresses. (Spam rules still apply.) Creating a custom whitelist You can create a custom whitelist of domains so that email messages from those domains are excluded from all spam processing. If you activate real-time blacklisting and antispam whitelist exclusion, when spam processing begins, Symantec Mail Security for SMTP checks the antispam whitelist first and then queries the real-time blacklists. If the envelope sender matches a domain that is entered in the antispam whitelist, the email message is allowed. If it does not match, real-time blacklists are checked. If there is a match, the email message is blocked. Email messages from domains that are listed in the whitelist are still processed for content violations (including spam rule violations) and viruses.