From: Mark Martinec (Mark.Martinec+postfixijs.si)
Date: Fri Dec 01 2006 - 19:03:28 CST

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On Saturday December 2 2006 01:21, Ronald F. Guilmette wrote:
> My (trivial) plan is that for each local mail user... which in my case
> here always corresponds to some actual UNIX "user" account (i.e. an entry
> in /etc/passwd)... a smallish data base will be maintained for that user
> of _all_ of the e-mail addresses that he's sent e-mail to. That's his
> whitelist. If anybody on his whitelist sends him any kind of automated
> bounce, or any kind of automated response at all, it will be let in.
> It's just that simple.

Btw, this is pretty much how 'pen pals' feature in amavisd-new works.
See release notes: http://www.ijs.si/software/amavisd/release-notes.txt
and search for:
- new feature: "pen pals soft-whitelisting" lowers spam score of received
  replies (or followup correspondence) to a message previously sent by a
  local user to this address;
  ...

Mark

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