From: Wietse Venema (wietseporcupine.org)
Date: Mon Oct 01 2007 - 20:05:58 CDT

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Ed Sawicki:
> I've built a policy filter that works well most of
> the time. Sometimes though, I see this appear in the
> log:
>
> ... warning: missing attribute action in input from 127.0.0.1:2525
>
> and this is the result that Postfix sends to the sender:
>
> 451 4.3.5 Server configuration problem; ....
>
> I'm still troubleshooting this problem but perhaps
> someone could give me some general pointers.

The policy daemon needs to reply with an "action".

Citing from: http://www.postfix.org/SMTPD_POLICY_README.html#protocol

    The policy server replies with any action that is allowed in
    a Postfix SMTPD access(5) table. Example:

    action=defer_if_permit Service temporarily unavailable
    [empty line]

    This causes the Postfix SMTP server to reject the request with
    a 450 temporary error code and with text "Service temporarily
    unavailable", if the Postfix SMTP server finds no reason to
    reject the request permanently.

            Wietse

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