Re: [AMaViS-user] new error

Mark Nernberg,

> Using Amavisd-new 2.3.3, on FreeBSD 6.0, with Postfix 2.3 (snap).
> I have made no changes to the system lately.
> However, recently, I've begun receiving the following error from Amavis:
> Jan 17 10:58:22 postoffice amavis[16449]: (16449-01) ESMTP: 504 5.5.4 RCPT
> command parameter not implemented: ORCPT=rfc822;phil@cindrich.com;
> PENALIZE: RCPT TO:<phil@cindrich.com> ORCPT=rfc822;phil@cindrich.com\r\n
> The setup is: postfix on port 25 -> smtpd_proxy_filter on localhost:10023
> (amavisd-new) -> postfix on localhost:10025 -> delivery.
> The message is being rejected by amavisd in the middle -- however, it only
> appears to be happening with certain specific servers.

This happens because amavisd-new is not a transparent smtp proxy,
yet you are using it as a proxy content filter.

In-depth reason is that your Postfix offers DSN support in its response
to EHLO, but amavisd-new 2.3.0 does not support this SMTP extension.
When a client sees that DSN is offered and decides to make use of it,
it provides ORCPT (and three other) parameteres to MAIL FROM and RCPT TO
commands, which Postfix passes on to amavisd-new, but amavisd-new does
not know how to deal with that and rightfully rejects the command
(it never announced DSN support in its EHLO response, so should not
be given DSN optional parameters by the client).

The simple answer is: do not use amavisd-new in an unsupported setup.

A possible workaround solution is to configure Postfix
to not offer DSN support:
smtpd_discard_ehlo_keywords = silent-discard, dsn

Another possible workaround is to wait for amavisd-new 2.4.0,
which will offer DSN support.

Mark



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