FYI: Content-MD5(-Origin) hacks

[Martin Hamilton <]

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Apologies for cross-posting!  This might be of interest... :-)

Ciao!

Martin




<URL:http://www.net.lut.ac.uk/~martin/antispam/>

What's this ?

  Some hacks on widely used mail programs which let you suppress
  duplicate copies of messages with exactly the same content.

Why ?

  This is a characteristic of lots of Bad Things, e.g. sp*m,
  pathologically broken mail systems/gateways, and malconfigured
  mail systems.

Does it work ?

  Seems to - but you'd have to be crazy to run it on a production
  system!  Needs some alpha testers, hence this message :-)

MANIFEST:

  draft-hamilton-content-md5-origin-00.txt - tech docs

  exim-hacks      - patch for Exim 1.82 (new version!)
  sendmail-hacks  - patch for sendmail 8.8.8
  procmail-hacks  - patch for procmail 3.11pre7
  majordomo-hacks - not yet!  watch the skies!!

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