Victor.DuchovniMorganStanley.com
Date: Thu Jul 01 2004 - 14:39:22 CDT

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On Thu, 1 Jul 2004, Florian Effenberger wrote:

> Now, when I send through this server, I receive
>
> ===
> remotehost.tld said: 504 5.5.4 MAIL command parameter error: AUTH=<> (in
> reply to RCPT TO command)
> ===

Show the *complete* log entry. Do not trim any leading information. You
can change just the address localpart if you cannot test with a dummy
address.

> which seems to come from amavisd-new.

So are you talking to a remote peer or a content filter?

> When manually (telnet port 25) sending the message with the same data
> and same authentication (AUTH PLAIN), it works just fine. I think
> Postfix sends out some wrong data to my remote server, but I don't know
> where to search.
>

The RFC that defines SMTP AUTH defines an extended MAIL syntax:

        MAIL FROM:<return-address> AUTH=<authenticated-sender>

When an authenticated SMTP client is not doing initial submission it is
supposed to send AUTH=<>. An MTA that claims to support AUTH, but does not
understand "AUTH=<>" is broken. Postfix is just fine.

--
        Viktor.

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