How does the spam filter identify, quarantine, and notify me of messages suspected to be spam?
When first received at the university, e-mail is evaluated based on the source of the message: the spam filtering system examines the IP address of the server sending or relaying a message and checks this against a list of known bad addresses. Messages sent from these bad addresses are blocked outright. Next, after the message sender is approved, the filter scans the message’s content, including all headers, the body, and any attachments, and compares it to the rules for identifying spam. If a part of the message is found to match one or more rules, this raises the message’s spam score, or probability of being spam. All messages are assigned a probability that it is spam based on specific rules and a variety of analytical techniques. The spam filtering system will automatically delete messages assessed at a 99% or 100% probability of being spam. Messages assessed with a 50% to 98% likelihood of being spam will be quarantined on the spam filtering server and you will receive a daily sum
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