[57north-discuss] GMail Users Beware

[Iain R. Learmonth]

Hi,

Due to DMARC being deployed by GMail, some legitimate mails from 57North
mailing lists may end up in your spam filter.

Google clearly felt left out when Yahoo deployed this technology badly and
they wanted to mess people up too.

If this turns into a problem with bounces or blacklisting, we will just
remove GMail users from the list without warning.

You have been warned.

Iain.

----- Forwarded message from Brian E Carpenter <brian.e.carpenter at gmail.com> -----

Date: Fri, 29 Aug 2014 17:05:53 +1200
From: Brian E Carpenter <brian.e.carpenter at gmail.com>
To: IETF discussion list <ietf at ietf.org>
Subject: gmail users read on...
User-Agent: Thunderbird 2.0.0.6 (Windows/20070728)

I hate to bring this topic up again but people should perhaps be aware
that some legitimate IETF mail is now being automatically spam filtered
for gmail recipients. Here is an anonymized version of what I just wrote
to someone.

Be aware that as a result of corporate IT decisions at your company and
at Google, your mail to IETF lists is being forcibly tagged as spam for
gmail recipients.

1) Example is announcing DMARC p=reject policy:

_dmarc.example.com   text =

        "v=DMARC1; p=reject; sp=reject"

2) gmail asserts a DMARC failure when your mail has been forwarded
by an IETF list such as XYZ:

Authentication-Results: mx.google.com;
       spf=pass (google.com: domain of XYZ-bounces at ietf.org designates 2001:xxxxxxxxx as permitted sender)
smtp.mail=XYZ-bounces at ietf.org;
       dkim=pass header.i=@ietf.org;
       dmarc=fail (p=REJECT dis=NONE) header.from=example.com

3) then gmail forcibly classes your message as spam.

Since many IETF participants use gmail, many people (myself included)
will not be seeing your mail unless they happen to check their spam
folder.

Regards
   Brian Carpenter


----- End forwarded message -----

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