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Chapter 1 Introduction
Micro-updates 3
Micro-updates
Cloudmark stores message fingerprints generated though the Global Threat
Network in near-real-time. Micro-updates are the mechanism that allows
Cloudmark customers to download the latest fingerprint data at regular intervals.
Micro-updates enable Cloudmark to
• maintain the highest level of accuracy on spam, virus, and phishing messages
as well as legitimate messages
• handle new varieties of email threats proactively and automatically
• reduce false positives
• eliminate manual message analysis with a fully-automated approach
To maintain the highest possible accuracy, the micro-updates feature must be
correctly configured. For complete information, see Chapter 4, “Micro-Updates”.
Message scoring
When the Cloudmark Cartridge scans a message, it assigns a spam score (as a
percentage) to indicate the likelihood that the message is an abusive message
(such as spam, phishing, or a virus). For example, if the cartridge assigns a
message a score of 99, it means that Cloudmark is 99% certain that message is
bad; a score of 1 means that Cloudmark is almost certain the message is
legitimate.
When used in conjunction with Cloudmark Authority Engine SDK (CMAE
SDK) 2.0 or later, the cartridge may also provide information about each
message’s classification (spam, phishing, virus, and so on). Consult your vendor
to find out whether your implementation of the CMAE SDK supports this
feature.
You can establish your own policies for handling spam, and configure your
application to take action on a message based on its spam score. Such actions
typically include one or more of the following:
• storing spam in a designated folder
• flagging spam messages in the Subject field
• deleting spam
• returning spam to its original sender