10 lines
649 B
Plaintext
10 lines
649 B
Plaintext
The Distributed Checksum Clearinghouses or DCC is an anti-spam content filter
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that runs on a variety of operating systems. As of the middle of 2007, it
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involves millions of users, more than six hundred thousand client computer
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systems, and more than 250 servers collecting and counting checksums related to
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more than 300 million mail messages on week days. The counts can be used by
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SMTP servers and mail user agents to detect and reject or filter spam or
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unsolicited bulk mail. DCC servers exchange or "flood" common checksums. The
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checksums include values that are constant across common variations in bulk
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messages, including "personalizations".
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