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Re: -o smtpd_banner very limited

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  • Victor Duchovni
    ... http://www.postfix.org/master.5.html ... -o name=value Override the named main.cf configuration parameter. The parameter value can refer to other
    Message 1 of 2 , Jan 3, 2011
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      On Tue, Jan 04, 2011 at 07:14:34AM +0100, Ralf Hauser wrote:

      > When I want to add a different banner with -o in master.cf for a
      > secondary smtpd, this fails

      http://www.postfix.org/master.5.html

      ...

      -o name=value
      Override the named main.cf configuration
      parameter. The parameter value can refer to
      other parameters as $name etc., just like in
      main.cf. See postconf(5) for syntax.

      NOTE 1: do not specify whitespace around the
      "=". In parameter values, either avoid
      whitespace altogether, use commas instead of
      ===>> spaces, or consider overrides like "-o
      ===>> name=$override_parameter" with $over-
      ===>> ride_parameter set in main.cf.

      NOTE 2: Over-zealous use of parameter over-
      rides makes the Postfix configuration hard
      to understand and maintain. At a certain
      point, it might be easier to configure mul-
      tiple instances of Postfix, instead of con-
      figuring multiple personalities via mas-
      ter.cf.

      http://www.postfix.org/MULTI_INSTANCE_README.html

      Finally, no client software cares what your banner says beyond the minimal:

      220 server.example.com ESMTP

      So banner customization is almost always pointless.

      --
      Viktor.
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