strange blocking behaviour with zen.spamhaus.org

Alex Neuman alex at vidadigital.com.pa
Mon Feb 11 21:53:00 GMT 2013


Sounds about right. I tend to avoid using Norton DNS, OpenDNS or any other
non-compliant DNS service on mail gateways. They're ok for home setups and
web proxies, sometimes. Mail servers require more adherence to standards.

On Mon, Feb 11, 2013 at 3:44 PM, Jerry Benton
<jerry.benton at mailborder.com>wrote:

> I was thinking along similar lines. Not a specific DNS server solution,
> but more along the lines of a DNS or connectivity interruption.
>
> On Monday, February 11, 2013, Raymond Dijkxhoorn <raymond at prolocation.net>
> wrote:
> > Hai!
> >
> > My bet is that you use opendns as dns server? Correct?
> >
> > Thanks,
> > Raymond Dijkxhoorn, Prolocation
> >
> > Op 11 feb. 2013 om 20:11 heeft "Harondel J. Sibble" <
> mailscanner at pdscc.com> het volgende geschreven:
> >
> >> Anyone using zen.spamhaus.org rbl in MS and at the MTA level, noticing
> >> weirdness over the past say week or so?
> >>
> >> Here's a couple of MTA level examples I've been seeing
> >>
> >>    Feb 11 06:07:14 ranger1 postfix/smtpd[13327]: NOQUEUE: reject: RCPT
> from
> >>    alias8.phx2-aud-mta-out5.cnet.com[216.239.122.68]: 554 5.7.1 Service
> >>    unavailable; Client host [216.239.122.68] blocked using
> zen.spamhaus.org;
> >>    from=<newsletters at zdnet.online.com> to=<zdnet at pdscc.com> proto=ESMTP
> >>    helo=<alias8.phx2-aud-mta-out5.cnet.com>
> >>
> >>    Feb 11 07:56:19 ranger1 postfix/smtpd[16391]: NOQUEUE: reject: RCPT
> from
> >>    lists.freeswitch.org[198.22.64.215]: 554 5.7.1 Service unavailable;
> Client
> >>    host [198.22.64.215] blocked using zen.spamhaus.org;
> >>    from=<freeswitch-users-bounces at lists.freeswitch.org> to=<
> help at pdscc.com>
> >>    proto=ESMTP helo=<lists.freeswitch.org>
> >>
> >> These are from mailing lists primarily, and if I check the ip address
> noted
> >> in the mxtoolbox blacklist check or enter the ip at the spamhaus site,
> there
> >> is no listing, WTF????
> >>
> >> --
> >> Harondel J. Sibble
> >> Sibble Computer Consulting
> >> Creating Solutions for the small and medium business computer user.
> >> help at pdscc.com (use pgp keyid 0x3AD5C11D) http://www.pdscc.com
> >> Blog: http://www.pdscc.com/blog
> >> (604) 739-3709 (voice)
> >>
> >> --
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> >> mailscanner at lists.mailscanner.info
> >> http://lists.mailscanner.info/mailman/listinfo/mailscanner
> >>
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> >>
> >> Support MailScanner development - buy the book off the website!
> > --
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> >
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> >
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> >
>
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>


-- 

--

Alex Neuman van der Hans
Reliant Technologies / Vida Digital
http://vidadigital.com.pa/

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