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212210header_checks or maildrop?

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  • Crayon
    Jan 1, 2007
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      I'm new to postfix (having used qmail for several years). In my old setup
      I had maildrop rules that are run on addresses which I use to receive
      mailing lists. So for example, for an address that is used solely for
      receiving this list, the maildrop rules would check for the presence of
      these headers:

      Sender: owner-postfix-users@...
      Precedence: bulk
      List-Post: <mailto:postfix-users@...>
      List-Help: <http://www.postfix.org/lists.html>
      List-Unsubscribe: <mailto:majordomo@...>
      List-Subscribe: <mailto:majordomo@...>

      If the check fails the mail is unlikely to have come from the list and is
      most likely spam (or a direct reply from someone on the list - which I
      don't want) and gets rejected.

      What I would like to know is, can something similar be implemented using
      postfix's header_checks? My reading of the docs suggests it can't be done
      because postfix only processes a single header at a time and makes a
      decision per header.

      Another thing is I would like to reject mails don't have a "Subject:"
      header (or it is empty). Again, because of the way the header_checks are
      done I don't think I can check for the absence of a particular header?

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