Re: Mail not bounced after a 5xx error

[Andrey Blochintsev <bag@iptelecom.net.ua>]

On Mon, 14 Apr 2003, Matti Aarnio wrote:

> On Mon, Apr 14, 2003 at 04:33:10PM +0200, wilbert.schapendonk@nld.mci.com wrote:
> > Hi,
> >
> > We are running Zmailer 2.99.56-pre4 #1 from CVS and are experiencing a
> > problem where zmailer leaves mail in the queue when the remote server
> > issues a 5xx error after the 'MAIL FROM' command and an additional 5xx
> > error when zmailer continues with a 'RCPT TO' command.
>
> This is weird, since past couple months there has been no changes
> in the  smtp TA processing logic -- since version 1.262, or since
> 26-Jun-2002.
>
> > The session goes like this:
> >
> >     220 mail.exampledomain.com ESMTP Sendmail 8.12.8/8.12.6; Mon, 14 Apr 2003 11:31:54 +0200 (CEST)
> >     EHLO fallback.exampledomain.com
> >     250-mail.exampledomain.com Hello fallback.exampledomain.com, pleased to meet you
> >     250-ENHANCEDSTATUSCODES
> >     250-PIPELINING
> >     250-8BITMIME
> >     250-SIZE
> >     250-DSN
> >     250-ETRN
> >     250-DELIVERBY
> >     250 HELP
> >     MAIL From:<junk@spammerdomain.com> BODY=8BITMIME SIZE=381
> >     RCPT To:<user@exampledomain.com>
> >     DATA
> >     550 5.0.0 <junk@spammerdomain.com>... Go away, we don't want you here
> >     503 5.0.0 Need MAIL before RCPT
> >     503 5.0.0 Need MAIL command
> >     RSET
> >
> > This mail would stay in the queue with 'stat=deferred  ->> 503 5.0.0 Need
> > MAIL before RCPT' and zmailer will try to deliver it using the same
> > sequence of commands until the mail expires.
>
> I simulated this with explicitely created blocked source address,
> and a generic scratchpad target address:
>
>   ...
>   220 vger.kernel.org ZMailer Server 2.99.56-pre4 #1 ESMTP+IDENT ready at Mon, 14 Apr 2003 14:28:54 -0400
>   EHLO mail.zmailer.org
>   250-vger.kernel.org Hello mail.zmailer.org
>   250-SIZE 0
>   250-8BITMIME
>   250-PIPELINING
>   250-ENHANCEDSTATUSCODES
>   250-DSN
>   250-ETRN
>   250 HELP
>   MAIL From:<me-spammer@zmailer.org> BODY=8BITMIME SIZE=271
>   RCPT To:<nobody@vger.kernel.org> NOTIFY=FAILURE
>   DATA
>   553 5.7.1 For MAIL FROM address <me-spammer@zmailer.org> policy analysis reported: Your domain is not liked source for email
>   550 5.7.1 Access denied by the policy analysis functions by earlier rejection
>   503 5.5.2 Waiting for MAIL command
>     smtp_sync() did yield code 69/UNAVAILABLE (rcptstates = 0x2440)
>     .. timeout ? smtp_sync() rc = 69
>   scheduler done processing 258556-7246
>
>
> Weird...    Code should be equivalent whatever version you are running,
> to be exact.
>
> Perhaps this is data dependent, somehow.

The difference is code recevived as reply to "RCPT TO: ..." command

zmailer smtpserver says "550 ... Access denied"
	zmailer transports/smtp interpretation:
		"EX_NOUSER" (permanent error)

sendmail (?) say "503 ... "
	zmailer transports/smtp interpretation:
		protocol error, we will try later...:
...
        case 503: /* Bad sequence of commands */
                status = "5.5.0";
                rc = EX_TEMPFAIL;
...




>
>
> > Is there a way to get these messages bounced after the first delivery
> > attempt?
> >
> > Thanks,
> >
> > Wilbert
>
>

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