From: Wietse Venema (wietseporcupine.org)
Date: Fri Sep 14 2007 - 13:51:20 CDT

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trent lacoye:
> Hi,
>
> I have a policy server set up to do my smtpd_client_restrictions, and in
> this server I would like to add a custom header so that another server
> knows the mail was already checked. It seems, though, that you can't use
> the 'prepend' action during client command restrictions. Does anybody
> know if there is a way around that, without setting up another policy
> server during recipient command restrictions. I'd like to only have
> one policy server run at helo time.

You can specify PREPEND only in the context of a mail transaction.
At the CONNECT and HELO stages there is no mail transaction context,
nor is there one after END-OF-DATA.

You can use the same policy server at the RCPT stage and look at
the protocol_state attribute: if it is the first RCPT after HELO
or EHLO, send your PREPEND command (or send the PREPEND at the
MAIL stage).

One SMTP server process sends all its queries over the same policy
connection, except when the policy daemon crashes.

        Wietse

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