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- The Distributed Checksum Clearinghouses or DCC is an anti-spam content
- filter that runs on a variety of operating systems. The counts can
- be used by SMTP servers and mail user agents to detect and reject
- or filter spam or unsolicited bulk mail. DCC servers exchange or
- "flood" common checksums. The checksums include values that are
- constant across common variations in bulk messages, including
- "personalizations."
- Note that this installs three setuid binaries in /usr/bin.
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