[CWG-Stewardship] FW: Marc's presentation and report with some background
Andrew Sullivan
ajs at anvilwalrusden.com
Sat Feb 20 04:40:54 UTC 2016
DMARC domains simply don't work with mailing lists. It's a well-known problem.
A
--
Andrew Sullivan
Please excuse my clumbsy thums.
> On Feb 19, 2016, at 18:28, David Conrad <david.conrad at icann.org> wrote:
>
> Paul,
>
>
>
>> On 2/19/16, 2:29 AM, "cwg-stewardship-bounces at icann.org on behalf of Paul M Kane - CWG" <cwg-stewardship-bounces at icann.org on behalf of paul.kane-cwg at icb.co.uk> wrote:
>> Sorry for delay - there is a gremlin somewhere on the CWG mailing list.... I
>> receive direct emails to my but not those distributed via the CWG mailing list
>> at the moment...
>
> FWIW, I checked with ICANN IT. Their response is below.
>
> Regards,
> -drc
> --------
> It stems from his email's DMARC policy.
>
> I looked at our email logs to Paul, and messages from this list produce errors like this:
>
> <22>Feb 4 17:29:59 smtp1 sendmail[24858]:u14HRR8B024837:to=<paul.kane-cwg at icb.co.uk>,<Paul.Kane at icb.co.uk>, delay=00:02:31 , xdelay=00:00 :06 , mailer=esmtp, pri=1662112, relay=mail001.icb.co.uk.[193.223.78.139 ], dsn=4.0.0, stat=Deferred: 403 4.7.0 TLS handshake failed.
>
> The specific [mailing list software] setting that I suspect to be the gremlin is here:
>
> "Replace the From: header address with the list's posting address to mitigate issues stemming from the original From: domain's DMARC or similar policies."
> This is set to "NO" currently. We can set this list to munge the FROM when postings are made to circumvent Paul's block, and I believe this will allow him to receive messages from the list. However, it will change the FROM field for all recipients to FROM: Listname on behalf of Listname instead of FROM: Listname on behalf of Sendername
>
>
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