Re: several messages

"Al Iverson" <aiverson@spamresource.com> Fri, 14 November 2008 18:51 UTC

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Date: Fri, 14 Nov 2008 13:51:14 -0500
From: Al Iverson <aiverson@spamresource.com>
To: ietf@ietf.org
Subject: Re: several messages
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On Fri, Nov 14, 2008 at 1:45 PM, John C Klensin <john-ietf@jck.com> wrote:
>
>
> --On Thursday, 13 November, 2008 11:56 -0500 Rich Kulawiec
> <rsk@gsp.org> wrote:
>
>> On Wed, Nov 12, 2008 at 11:33:46AM -0800, Randy Presuhn wrote:
>>> Huh?  Concrete, real example:  I send a message to an IETF
>>> mailing list. A list subscriber's ISP rejects the forwarded
>>> message.  IETF's mailman drops the subscriber, because this
>>> has been happened multiple times. I can't notify the
>>> subscriber, because their ISP also rejects my email.
>>
>> This is not a DNSBL problem.  This is a problem with the
>> subscriber's ISP, which is not operating their mail system per
>> de facto best practices -- which include making sure that
>> rejection notices provide an alternate-channel means of
>> contacting them in order to discuss apparently-erroneous
>> blocking. There are a sizable number of techniques for doing
>> this; I happen to think the best ones are quite simple, e.g.:
>>...
>
> Sigh.
>
> Rich, you can blame "someone else" all you like, but the reality
> here is that
>
> (1) If the system supporting the DNSBL is following the email
> protocols and decides to reject the message or bounce it, rather
> than, e.g., assigning a score and moving it into the
> user-related mail store, it replies back to the IETF list
> manager, not the original sender.

This strikes me as unrelated to DNSBLs. Am I misunderstanding? How is
this DNSBL-specific?

Regards,
Al Iverson

-- 
Al Iverson on Spam and Deliverability, see http://www.spamresource.com
News, stats, info, and commentary on blacklists: http://www.dnsbl.com
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