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Subject: =?utf-8?q?=5BSR-Users-ES=5D_?= Re: Change in mailing list configuration related to DMARC spam filter
From: Henning_Westerholt_a_través_de_sr-users-es <sr-users-es () lists ! k
Date: 2023-09-22 9:01:28
Message-ID: DB7PR07MB3882809712AA27ED6E9AF04CBFFFA () DB7PR07MB3882 ! eurprd07 ! prod ! outlook ! com
[Download RAW message or body]
Hello,
there has been no feedback regarding this change, so the setting was done s=
ome minutes ago.
In case of unforeseen issues, just follow up on the sr-users lists for furt=
her discussions.
Thanks,
Henning
--
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://gilawa.com<https://gilawa.com/>
From: Henning Westerholt
Sent: Dienstag, 19. September 2023 10:11
To: Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>; Kama=
ilio (SER) - Devel Mailing List <sr-dev@lists.kamailio.org>; business@lists=
.kamailio.org; sr-docs@lists.kamailio.org; kamailio-announce@lists.kamailio=
.org; sr-users-es@lists.kamailio.org
Subject: Change in mailing list configuration related to DMARC spam filteri=
ng
Hello,
due to some changes from certain cloud infrastructure provider related to s=
pam filtering with DMARC, we need to change the list manager "mailman" conf=
iguration for the following lists:
* sr-users
* sr-user-es
* sr-dev
* business
* sr-docs
* kamailio-announce
* the administrative mailing list
The change will impact the "From" that is displayed in your email program. =
Without that change large e-mail providers (Gmail, Microsoft O365) will rej=
ect messages from a sender with certain strict DMARC policy. This is alread=
y affecting several people on the lists (for example with GitHub notice mai=
ls), but over time the problem will certainly increase.
Regarding the technical change:
We will munge the From: header so it doesn't contain the domain that trigge=
rs the DMARC rejection. Essentially, the Mailman list takes ownership of t=
he message and injects its own address into the From: header. This can aff=
ect reply-to-sender, although we add the original From: address in the Repl=
y-To: header (or sometimes the Cc: header) to reduce the impact of this. We=
plan to do this for all emails unconditionally, regardless of their sender=
DMARC policy, to have an identical behaviour for all users. Please refer t=
o this [1] page for more details. For a general description of DMARC refer =
to this page [2].
This change should have not a big impact for you, but some users might need=
to adapt some mail filters. Therefore, we would like to gather feedback on=
that change from you. We expect that the most visible change is that It wi=
ll be not possible anymore to just reply by e-mail to mails from GitHub and=
have them "automatically" added to the discussed issue. This feature was s=
o far used rarely and only from a few people.
We plan to implement this change by the end of this week, when its done it =
will be also shortly announced.
Best regards,
Henning Westerholt
[1] https://wiki.list.org/DEV/DMARC
[2] https://dmarc.org/overview/
--
Henning Westerholt - https://skalatan.de/blog/
Kamailio services - https://gilawa.com<https://gilawa.com/>
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<div class="WordSection1">
<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">there has been no feedback regarding this \
change, so the setting was done some minutes ago.<o:p></o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB">In case of unforeseen issues, just follow up on \
the sr-users lists for further discussions.<o:p></o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB">Thanks,<o:p></o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB">Henning<o:p></o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p> <p \
class="MsoNormal"><o:p> </o:p></p> <div>
<p class="MsoNormal"><span lang="EN-GB" style="mso-ligatures:none">-- \
<o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-GB" \
style="mso-ligatures:none">Henning Westerholt – </span><span \
style="mso-ligatures:none"><a href="https://skalatan.de/blog/"><span \
lang="EN-GB">https://skalatan.de/blog/</span></a></span><span lang="EN-GB" \
style="mso-ligatures:none"><o:p></o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB" style="mso-ligatures:none">Kamailio services – </span><span \
style="mso-ligatures:none"><a href="https://gilawa.com/"><span \
lang="EN-GB">https://gilawa.com</span></a></span><span lang="EN-GB" \
style="mso-ligatures:none"><o:p></o:p></span></p> </div>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt">
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm \
0cm;font-size:pt"> <p class="MsoNormal"><b><span lang="EN-GB" \
style="mso-ligatures:none;mso-fareast-language:DE">From:</span></b><span lang="EN-GB" \
style="mso-ligatures:none;mso-fareast-language:DE"> Henning Westerholt <br>
<b>Sent:</b> Dienstag, 19. September 2023 10:11<br>
<b>To:</b> Kamailio (SER) - Users Mailing List <sr-users@lists.kamailio.org>; \
Kamailio (SER) - Devel Mailing List <sr-dev@lists.kamailio.org>; \
business@lists.kamailio.org; sr-docs@lists.kamailio.org; \
kamailio-announce@lists.kamailio.org; sr-users-es@lists.kamailio.org<br> \
<b>Subject:</b> Change in mailing list configuration related to DMARC spam \
filtering<o:p></o:p></span></p> </div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hello,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-GB">due to some changes from certain cloud \
infrastructure provider related to spam filtering with DMARC, we need to change the \
list manager “mailman” configuration for the following \
lists:<o:p></o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB"><o:p> </o:p></span></p> <ul style="margin-top:0cm" type="disc">
<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 \
lfo3">sr-users<span lang="EN-GB"><o:p></o:p></span></li><li class="MsoListParagraph" \
style="margin-left:0cm;mso-list:l0 level1 lfo3">sr-user-es<span \
lang="EN-GB"><o:p></o:p></span></li><li class="MsoListParagraph" \
style="margin-left:0cm;mso-list:l0 level1 lfo3">sr-dev<span \
lang="EN-GB"><o:p></o:p></span></li><li class="MsoListParagraph" \
style="margin-left:0cm;mso-list:l0 level1 lfo3">business<span \
lang="EN-GB"><o:p></o:p></span></li><li class="MsoListParagraph" \
style="margin-left:0cm;mso-list:l0 level1 lfo3">sr-docs<span \
lang="EN-GB"><o:p></o:p></span></li><li class="MsoListParagraph" \
style="margin-left:0cm;mso-list:l0 level1 lfo3">kamailio-announce<span \
lang="EN-GB"><o:p></o:p></span></li><li class="MsoListParagraph" \
style="margin-left:0cm;mso-list:l0 level1 lfo3"><span lang="EN-GB">the administrative \
mailing list<o:p></o:p></span></li></ul> <p class="MsoNormal"><span \
lang="EN-GB"><o:p> </o:p></span></p> <p class="MsoNormal"><span lang="EN-GB">The \
change will impact the “From” that is displayed in your email program. \
Without that change large e-mail providers (Gmail, Microsoft O365) will reject \
messages from a sender with certain strict DMARC policy. This is already affecting \
several people on the lists (for example with GitHub notice mails), but over time the \
problem will certainly increase.<o:p></o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB"><o:p> </o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB">Regarding the technical change:<o:p></o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB">We will munge the <strong><span \
style="font-family:"Calibri",sans-serif">From: </span></strong>header \
so it doesn't contain the domain that triggers the DMARC rejection. \
Essentially, the Mailman list takes ownership of the message and injects its \
own address into the <strong><span \
style="font-family:"Calibri",sans-serif">From:</span></strong> header. \
This can affect reply-to-sender, although we add the original <strong><span \
style="font-family:"Calibri",sans-serif">From:</span></strong> address in \
the <strong><span \
style="font-family:"Calibri",sans-serif">Reply-To:</span></strong> header \
(or sometimes the <strong><span \
style="font-family:"Calibri",sans-serif">Cc:</span></strong> header) to \
reduce the impact of this. We plan to do this for all emails unconditionally, \
regardless of their sender DMARC policy, to have an identical behaviour for all \
users. Please refer to this [1] page for more details. For a general description of \
DMARC refer to this page [2].<o:p></o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB"><o:p> </o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB">This change should have not a big impact for you, but some users might \
need to adapt some mail filters. Therefore, we would like to gather feedback on that \
change from you. We expect that the most visible change is that It will be not \
possible anymore to just reply by e-mail to mails from GitHub and have them \
“automatically” added to the discussed issue. This feature was so far \
used rarely and only from a few people. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-GB">We plan to implement this change by the end \
of this week, when its done it will be also shortly announced.<o:p></o:p></span></p> \
<p class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB">Best regards,<o:p></o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB">Henning Westerholt<o:p></o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB"><o:p> </o:p></span></p> <p \
class="MsoNormal"><span lang="EN-GB">[1] <a href="https://wiki.list.org/DEV/DMARC"> \
https://wiki.list.org/DEV/DMARC</a><o:p></o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB">[2] <a href="https://dmarc.org/overview/"> \
https://dmarc.org/overview/</a><o:p></o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB"><o:p> </o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB"><o:p> </o:p></span></p> <p class="MsoNormal"><span lang="EN-GB" \
style="mso-ligatures:none">-- <o:p></o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB" style="mso-ligatures:none">Henning Westerholt – </span><span \
style="mso-ligatures:none"><a href="https://skalatan.de/blog/"><span \
lang="EN-GB">https://skalatan.de/blog/</span></a></span><span lang="EN-GB" \
style="mso-ligatures:none"><o:p></o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB" style="mso-ligatures:none">Kamailio services – </span><span \
style="mso-ligatures:none"><a href="https://gilawa.com/"><span \
lang="EN-GB">https://gilawa.com</span></a></span><span lang="EN-GB" \
style="mso-ligatures:none"><o:p></o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB"><o:p> </o:p></span></p> <p class="MsoNormal"><span \
lang="EN-GB"><o:p> </o:p></span></p> </div>
</div>
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