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Re: Queer situation in smtp

It looks like there is no sokram.com.ar mx record. I can't resolve it 
from here myself. The other server might have an SMTP firewall or 
gateway (such as a Cisco PIX firewall with SMTP Fixup) that is blocking 
certain smtp commands. In this case it looks like the remote server 
might never be sending the "bye" command to signal that connection 
should be closed.

Maybe someone can further diagnose what the error messages like TEMPFAIL 
mean, maybe the server is signaling that it is temporarily unavailable 
(which could be an anti-spam technique).

All these error messages are pretty clear from the log you sent.

I hope that helps.


zmailer wrote:

>We are having a very queer situation with the delivery of mails to a
>particular domain. Though the connection to the remote MTA is working ok,
>the mails are expiring withou being sent. Analizying the logs It's not clear
>for us if it's a logging problem or if the application is not working as it
>There have not been reported problems with any other domains.
>The domain with problems is "tersuave.com.ar", below is an example of one of
>the bounced mails, the report and an extract of the logfile. In this example
>the other domain mangled with tersuave.com.ar is sokram.com.ar; but we have
>other situations with other domains.
>Hope you can help us, if you need more details please ask me.
>Thanks in advance.
>smtp logfile:
>10027C3DF-6085-8420#    DIAG: C='smtp' H='stgeorge.com.ar'
>U='rbux@stgeorge.com.ar' P='99' ID=131164/5439 L=0 -- stat='error2'
>notary='rbux@stgeorge.com.ar^Afailed^A5.1.1 (bad destination mailbox)^Asmtp;
>550 (Invalid recipient <rbux@stgeorge.com.ar>)^Adns; ms1.cscom.com.ar
>(|25||54675)^Asmtp[10027]' WTT='dns;
>ms1.cscom.com.ar'  MSG='^M<<- MAIL From:<tresproductores@datafull.com>
>SIZE=4595^M->> 250 Sender <tresproductores@datafull.com> and extensions
>(SIZE=4595) Ok^M<<- RCPT To:<rbux@stgeorge.com.ar>
>->> 550 Invalid recipient <rbux@stgeorge.com.ar>'
>10027C3DF-6086-8420r    503 No recipients specified
>10027C3DF-6087-8420#     smtp_sync() did yield code 69/UNAVAILABLE
>10027C3DF-6088-8420#    jobspec: Q/Q/245820     sokram.com.ar
>10027C3DF-6089-8420w    QUIT
>10027C3DF-6090-8420#    (closed SMTP channel - new host)
>10027C3DF-6091-8420#    245820:
>10027C3DF-6092-8420#    smtpopen: status = 100
>10027C3DF-6093-8420#    DIAG: C='smtp' H='sokram.com.ar'
>U='info@sokram.com.ar' P='99' ID=245820/243 L=0 -- stat='deferall'
>notary='info@sokram.com.ar^Afailed^A5.4.3 (DNS-failure)^Asmtp; 466 (No DNS
>response for host: sokram.com.ar; h_errno=0)^A^Asmtp[10027]'  MSG='smtp; 466
>(No DNS response for host: sokram.com.ar; h_errno=0)'
>10027C3DF-6094-8420#    jobspec: S/C/180286     tersuave.com.ar
>10027C3DF-6095-8420#    180286:
>10027C3DF-6096-8420#    (Connecting to `mail.tersuave.com.ar'
>[|25] Tue Sep  6 15:49:39 2005)
>10027C3DF-6097-8420#    localidentity=iface:eth0:1 bind() errno = 0
>10027C3DF-6098-8421#    Remote hung up on us while 1 responses missing
>10027C3DF-6099-8421#     smtp_sync() did yield code 75/TEMPFAIL
>10027C3DF-6100-8421#    ('220' expectance did yield 75 )
>10027C3DF-6101-8421#    smtpopen: status = 75
>10027C3DF-6102-8421#    DIAG: C='smtp' H='tersuave.com.ar'
>U='speralta@tersuave.com.ar' P='99' ID=180286/214 L=0 -- stat='retryat +60'
>notary='speralta@tersuave.com.ar^Afailed^A5.4.3 (DNS-failure)^Asmtp; 466 (No
>DNS response for host: sokram.com.ar; h_errno=0)^Adns; mail.tersuave.com.ar
>(|25||54677)^Asmtp[10027]' WTT='dns;
>mail.tersuave.com.ar'  MSG='^M<<- (null)^Mremote hung up on us while 1
>responses missing'
>10027C3DF-6103-8421#    jobspec: P/U/32858      soimet.com.ar
>10027C3DF-6104-8421w    QUIT
>10027C3DF-6105-8421#    (closed SMTP channel - new host)
>10027C3DF-6106-8421#    32858: <012701c5b305$d7fcbb40$8bab72c8@PC01>
>10027C3DF-6107-8422#    smtpopen: status = 100
>10027C3DF-6108-8422#    DIAG: C='smtp' H='soimet.com.ar'
>U='zpower@soimet.com.ar' P='99' ID=32858/717 L=0 -- stat='deferall'
>notary='zpower@soimet.com.ar^Afailed^A5.4.3 (DNS-failure)^Asmtp; 466 (No DNS
>response for host: soimet.com.ar; h_errno=0)^A^Asmtp[10027]'  MSG='smtp; 466
>(No DNS response for host: soimet.com.ar; h_errno=0)'
>10027C3DF-6109-8422#    jobspec: E/U/213064     ns9.velocom.com.ar
>Bounced mail:
>-----Original Message-----
>From: mailer-daemon@fibertel.com.ar [mailto:mailer-daemon@fibertel.com.ar]
>On Behalf Of The Post Office
>Sent: Tuesday, September 06, 2005 3:50 PM
>To: mbaletti@fibertel.com.ar
>Subject: Returned mail: see the transcript [FAILED(1)]
>This is a collection of reports about email delivery
>process concerning a message you originated.
>Some explanations/translations for these reports
>can be found at:
>      http://zmailer.org/delivery-report-decoding.html
>If you are our customer, further help is available
>at email address: root@fibertel.com.ar
>Reporting-MTA: dns; avas-mx03.fibertel.com.ar
>Return-Path: <mbaletti@fibertel.com.ar>
>Arrival-Date: Mon, 5 Sep 2005 15:15:32 -0300
>Local-Spool-ID: S180286AbVIESPc
>  Arrived Recipient:
>      rfc822;speralta@tersuave.com.ar
>  Original Recipient:
>      rfc822;speralta@tersuave.com.ar
>  Final Recipient:
>      RFC822;speralta@tersuave.com.ar
>  Status:
>      5.4.3 (DNS-failure)
>  Remote MTA:
>      dns; mail.tersuave.com.ar (|25||54677)
>  Last Attempt Date:
>      Tue, 6 Sep 2005 15:49:40 -0300
>      smtp[10027]
>  Diagnostic Code:
>      smtp; 466 (No DNS response for host: sokram.com.ar; h_errno=0)
>  Control data:
>      smtp tersuave.com.ar speralta@tersuave.com.ar 99
>  Diagnostic texts:
>      expired after 1 day 3 mins 19 secs, problem was:
>     <<- (null)
>     remote hung up on us while 1 responses missing
>Following is a copy of MESSAGE/DELIVERY-STATUS format section below.
>It is copied here in case your email client is unable to show it to you.
>The information here below is in  Internet Standard  format designed to
>assist automatic, and accurate presentation and usage of said information.
>In case you need human assistance from the Postmaster(s) of the system which
>sent you this report, please include this information in your question!
>    Virtually Yours,
>        Automatic Email Delivery Software
>Reporting-MTA: dns; avas-mx03.fibertel.com.ar
>Arrival-Date: Mon, 5 Sep 2005 15:15:32 -0300
>Local-Spool-ID: S180286AbVIESPc
>Original-Recipient: rfc822;speralta@tersuave.com.ar
>Final-Recipient: RFC822;speralta@tersuave.com.ar
>Action: failed
>Status: 5.4.3 (DNS-failure)
>Remote-MTA: dns; mail.tersuave.com.ar (|25||54677)
>Last-Attempt-Date: Tue, 6 Sep 2005 15:49:40 -0300
>Diagnostic-Code: smtp; 466 (No DNS response for host: sokram.com.ar;
>Following is copy of the message headers. Original message content may
>be in subsequent parts of this MESSAGE/DELIVERY-STATUS structure.
>Received: from [] ([]:1544 "EHLO ftmbnb19692005"
>	smtp-auth: "mbaletti") by avas-mr03.fibertel.com.ar with ESMTP
>	id S180286AbVIESPc; Mon, 5 Sep 2005 15:15:32 -0300
>X-Comment: RFC 2476 MSA function at avas-mr03.fibertel.com.ar logged sender
>identity as: mbaletti
>From:	"Baletti, Marcelo" <mbaletti@fibertel.com.ar>
>To:	"'Sandra Peralta'" <speralta@tersuave.com.ar>
>Subject: RE: 
>Date:	Mon, 5 Sep 2005 15:15:30 -0300
>MIME-Version: 1.0
>Content-Type: multipart/alternative;
>	boundary="----=_NextPart_000_0042_01C5B22C.A78762A0"
>X-Mailer: Microsoft Office Outlook, Build 11.0.6353
>In-reply-to: <WorldClient-F200509051403.AA03550464@tersuave.com.ar>
>X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.2670
>Thread-index: AcWyOzh2zM5zb+52RuOMNn6ZQw606QACob+w
>X-Fib-Al-Info: Al
>X-Fib-Al-MRId: 7688a0042534ea58b8d7a3a512a7bb6a
>X-Fib-Al-From: mbaletti@fibertel.com.ar

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