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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Thanks Ray – I think the other option is where it wraps and attaches the original message, but certainly for me (using outlook) you
then have to open this attachment separately with an extra click which wasn’t so nice. So I agree “munging”, as already done on the neutron list, looks the most user friendly option<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Regards,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Freddie<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Raymond Osborn <rayosborn@me.com>
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<b>Sent:</b> 11 May 2020 19:49<br>
<b>To:</b> Akeroyd, Freddie (STFC,RAL,ISIS) <freddie.akeroyd@stfc.ac.uk><br>
<b>Cc:</b> nexus-committee@nexusformat.org<br>
<b>Subject:</b> Re: [NeXus-committee] Mailing list change to avoid DMARC/DKIM/SPF issues<o:p></o:p></span></p>
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<p class="MsoNormal">Freddie,<o:p></o:p></p>
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<p class="MsoNormal">I agree that doing something like this is essential. This is what we had to do for the neutron mailing list,
<a href="mailto:neutron@neutronsources.org">neutron@neutronsources.org</a>. There is an alternative solution where you configure Mailman to forward to the list without any modifications (e.g., adding [NeXus-committee] to the subject line and mailing list links
at the bottom), so that the DKIM signature is still valid. However, I find the change to the subject line helpful to identify the message context, so I think I’m in favor of the munge solution. There are more details at
<a href="https://seanthegeek.net/459/demystifying-dmarc/">https://seanthegeek.net/459/demystifying-dmarc/</a>. <o:p></o:p></p>
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<p class="MsoNormal">Ray <o:p></o:p></p>
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<p class="MsoNormal">On May 11, 2020, at 1:32 PM, Freddie Akeroyd - UKRI STFC via NeXus-committee <<a href="mailto:nexus-committee@shadow.nd.rl.ac.uk">nexus-committee@shadow.nd.rl.ac.uk</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Dear NeXus Committee,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Many sites are now implementing DMARC/DKIM/SPF checking of incoming email, this can cause issues for mailing lists as they forward mail on behalf of a user. A receiving site
would see the original sender domain in the “From”, but also see that is was not delivered by a trusted source for that domain and may then discard or reject the email.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">The mailman mailing list software has a “Munge From” option, this replaces the poster's address in the From: header with the list's posting address and adds the poster's address
to the addresses in the original Reply-To: header. The original sender name is mentioned in some way like “NeXus on behalf of Freddie Akeroyd” but the message now looks like it has come from the mailing list server and so avoids issues at the receiver if they
implement any DMARC policy of the original sender domain.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">The only potential consequence of this action is that the default behaviour of “reply” may change in some email clients, but I am already aware of sites starting to trial DMARC/DKIM/SPF
so I believe it is a change we will need to make. I have now enabled this option for the nexus-committee list and if all looks to be well I will also enable it for the general NeXus mailing list<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Regards,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">Freddie<span class="apple-converted-space"> </span><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif">_______________________________________________<br>
NeXus-committee mailing list<br>
</span><a href="mailto:NeXus-committee@nexusformat.org"><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:#954F72">NeXus-committee@nexusformat.org</span></a><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif"><br>
</span><a href="http://lists.nexusformat.org/mailman/listinfo/nexus-committee"><span style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:#954F72">http://lists.nexusformat.org/mailman/listinfo/nexus-committee</span></a><o:p></o:p></p>
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