[Xen-devel] Xen mailing lists: dropping Subject line tags, etc.

[Xen-devel] Xen mailing lists: dropping Subject line tags, etc.

[Ian Jackson]

Hi. This message is being sent once to each mailing list hosted by
the Xen Project.

Increasingly, mail systems on the public internet are demanding
restrictive SPF configurations [1] and DKIM signatures [2].

Currently the Xen Project systems have liberal configurations.
Unfortunately this means that we are having trouble with mails being
blocked as spam. We intend to tighten the configuration.

For mailing lists, this will mean we need to stop adding the
[list-name] tag to the Subject line, and stop adding the footers
giving mailing list information.

The information in the Subject line tag is also available in various
headers, mostly List-*, provided by Mailman, our mailing list manager
software.

If you are currently filtering based on Subject line tags, we
recommend you change to filtering based on the List-Id header. For
example, messages to xen-devel come with:
List-Id: Xen developer discussion <xen-devel.lists.xenproject.org>
You can make this change right away.

List subscribers and posters should not need to make any other
configuration changes.

We are not going to make this change immediately, and not before the
14th of March.  We'll make one further announcement when the change
has been made.

Thanks for your attention.
Ian.
(on behalf of the Xen Project)

[1] https://en.wikipedia.org/wiki/Sender_Policy_Framework
[2] https://en.wikipedia.org/wiki/Dkim#Annotations_by_mailing_lists

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Re: [Xen-devel] Xen mailing lists: dropping Subject line tags, etc.

[Marek Marczykowski-Górecki]

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On Wed, Feb 19, 2020 at 01:48:39PM +0000, Ian Jackson wrote:
> Hi. This message is being sent once to each mailing list hosted by
> the Xen Project.
> 
> Increasingly, mail systems on the public internet are demanding
> restrictive SPF configurations [1] and DKIM signatures [2].
> 
> Currently the Xen Project systems have liberal configurations.
> Unfortunately this means that we are having trouble with mails being
> blocked as spam. We intend to tighten the configuration.
> 
> For mailing lists, this will mean we need to stop adding the
> [list-name] tag to the Subject line, and stop adding the footers
> giving mailing list information.

Is that really necessary to make mail systems happy? I have managed some
mail servers including mailing lists few years ago and from what I
remember, it was necessary to just make it clear in the headers that
the email comes from the mailing list. This includes things like
(envelope) sender rewrite (SRS[3]) and adding own DKIM signature.

Personally, I don't mind dropping mail footer, but the tag in the
subject is really useful to distinguish various discussions in an INBOX
(when you're cc-ed explicitly).

[3] https://en.wikipedia.org/wiki/Sender_Rewriting_Scheme

-- 
Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

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