Date: Thu, 18 Jan 2001 19:39:06 -0500 From: Mike Tancsa <mike@sentex.net> To: Mark.Andrews@nominum.com, Gregory Bond <gnb@itga.com.au> Cc: Mark.Andrews@nominum.com, Christopher Schulte <christopher@schulte.org>, stable@freebsd.org Subject: Re: Weird sporadic DNS resolution problems Message-ID: <4.2.2.20010118193210.038e34d8@marble.sentex.net> In-Reply-To: <200101190027.f0J0RtF67341@drugs.dv.isc.org> References: <Your message of "Fri, 19 Jan 2001 10:50:59 %2B1100." <200101182350.KAA17112@lightning.itga.com.au>
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At 11:27 AM 1/19/2001 +1100, Mark.Andrews@nominum.com wrote:
> But did the A record of the MX exist? Was the zone correctly
> delegated? There are quite a few configuration error case
> transient errors.
In the past, you were able to send email to LAME zones. i.e. a server which
did not respond authoritatively. The question I have is when did this
change, and if so, is it a tuneable. The example I gave was supercom.ca.
Both their servers respond LAME in the classic sense.
ns4# mail -v postmasterd@supercom.ca
Subject: test ignore
EOT
postmasterd@supercom.ca... supercom.ca: Name server timeout
postmasterd@supercom.ca... Transient parse error -- message queued for
future delivery
postmasterd@supercom.ca... queued
ns4#
From a LINUX box
mail -v postmaster@supercom.ca
Subject: test ignore
Cc:
postmaster@supercom.ca... Connecting to mail.supercom.ca. via esmtp...
[root@devonium2 mdtancsa]# v220 mail.supercom.ca Lotus SMTP MTA Service Ready
>>> EHLO devonium2.sentex.ca
i250-mail.supercom.ca
250-SIZE 0
250 EXPN
>>> MAIL From:<root@devonium2.sentex.ca> SIZE=50
250 OK
>>> RCPT To:<postmaster@supercom.ca>
250 OK
>>> DATA
354 Enter Mail, end by a line with only '.'
>>> .
/250 Message received OK.
postmaster@supercom.ca... Sent (Message received OK.)
Closing connection to mail.supercom.ca.
>>> QUIT
221 GoodBye
Same rev of sendmail, asking another earlier BIND.
---Mike
---Mike
--------------------------------------------------------------------
Mike Tancsa, tel +1 519 651 3400
Network Administration, mike@sentex.net
Sentex Communications www.sentex.net
Cambridge, Ontario Canada www.sentex.net/mike
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