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About Anti-Spam protectionOne of the main tasks of Kaspersky Security is to filter out unwanted messages (spam) in the mail traffic of the server. Messages are scanned for spam by the Anti-Spam engine. Anti-Spam engine scans each message for signs of spam. First, Anti-Spam engine scans the attributes of the message, such as sender and recipient addresses, size, and headers (including the From and To fields). Second, Anti-Spam engine analyzes the message content (including the Subject header) and attached files. Anti-Spam engine is enabled by default. If required, you can disable the Anti-Spam engine or disable Anti-Spam scanning for any rule. You can also limit the size of messages to be scanned for spam. Depending on the sensitivity level, the application assigns messages in which spam or probable spam has been detected the specific statuses in accordance with the spam rating calculated by Anti-Spam. Spam rating is a whole number from 0 to 100 that reflects the number of times Anti-Spam engine was actuated in processing the message. The application also takes into account the responses from the DNSBL, SURBL and UDS servers and SPF technology to assign the spam rating. Based on the scan results, the Anti-Spam engine assigns the message one of the spam scan statuses and adds a status tag at the beginning of the message subject ( Depending on the status assigned, the application performs actions in accordance with the message processing rule settings. You can specify actions to be performed by the application on messages with a certain status. The default action performed on messages is |
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