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290569Re: Understanding master.cf pickup daemon parameters

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  • Robert Moskowitz
    Jan 9, 2013
      On 01/09/2013 04:10 PM, mouss wrote:
      > Le 09/01/2013 14:34, Robert Moskowitz a écrit :
      >> I have read the man page and
      >> http://www.postfix.org/BUILTIN_FILTER_README.html, but don't think I
      >> got the why of all of it yet.
      >>
      >> A couple howtos I have been using as guidance have the following
      >> content for master.cf
      >>
      >> pickup fifo n - n 60 1 pickup
      >> -o content_filter=
      >> -o receive_override_options=no_header_body_checks
      >>
      >>
      >> I will be using Amavisd-new, ClamAV, and SpamAssassin for content
      >> filtering. There are lots of other lines scattered around that are
      >> specific to these filtering tools. I think I am adding these lines to
      >> limit what pickup is doing as there will be other tools that will do
      >> more? Is that correct?
      >>
      >> Thank you.
      >>
      >>
      > the pickup service is used when you use the sendmail command to submit
      > mail (instead of using smtp).
      > many system programs (cron, logwatch ...) use the sendmail command to
      > send mail to root and other accounts. and here:
      >
      > 1) such programs assume a "no error" sendmail. in short, they won't
      > accept a "421 try later" etc. so unless the world gets on fire, the
      > sendmail command is supposed to take responsbility of the message and do
      > whatever to get it delivered. the submitter won't manage a queue or
      > retry etc.
      > that's wat the pickup service is for. it'll retry if it can't pass the
      > message to another "party". and if delivery is not possible, it'll try
      > to send an error message (a bounce).
      >
      > 2) some programs will send spam reports (think of a log parser...) which
      > do contain spammy words etc. you wouldn't want these to be blocked by a
      > content filter.
      >
      > 3) after all, this is "outbound" mail. so standard spam filters aren't
      > good at this game. you cannot use RBLs, and other reputation things. on
      > the other hand, if you see junk you can take action. so why care of
      > content filtering...

      Thank you for the excellent bit of education.
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