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24 lines
1.1 KiB
Plaintext
24 lines
1.1 KiB
Plaintext
The skem utility is a sendmail milter, that checks and maintains a list
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of whitelisted, temporary banned, and permanently blacklisted
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IP-addresses. How you obtain the entries is up to you, but the included
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logwatcher module provides one possibility.
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The list is stored in a directory, each entry being a file (usually --
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zero sized) or a symlink (usually -- a "broken" one). Such entries are
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stored efficiently (within the directory itself) and the directories are
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searched using the hash tables on modern file systems. At the same time,
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they can be listed, added, and removed with the simple ls(1), touch(1),
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and rm(1).
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This milter does not itself filter spam, instead it memorizes the
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verdicts issued by your other anti-spam defenses to reduce the system
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load and resource consumption, by temporarily rejecting the relays
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suspected of spamming (banned) and, optionally, by permanently rejecting
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the relays "convicted" of spamming (blacklisted).
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The idea is to stem the spam from real spam sources, while reducing the
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ill effects of false-positives to merely delaying, rather than rejecting
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future messages.
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WWW: http://virtual-estates.net/skem/
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