[lca2018-chat] DKIM and this list

[Shaun Walker]

Hi Russell,

Unfort this one went straight to my spam as
[image: Inline image 1]

I wonder if this is why not many others had seen this email?

Cheers,
Shaun

On Tue, Jan 9, 2018 at 6:29 PM, Russell Coker <russell at coker.com.au> wrote:

> I didn't get a reply to this message.  Who is the correct person to deal
> with
> this?
>
> On Sunday, 31 December 2017 2:58:44 AM AEDT Russell Coker wrote:
> > http://lists.lca2017.linux.org.au/pipermail/chat/2017-
> January/thread.html
> >
> > Could we please have this list work with DKIM messages?  Above is a link
> to
> > the archives from last year's list which includes a discussion of this.
> >
> > https://doc.coker.com.au/internet/dkim-and-mailing-lists/
> >
> > Above is a document I wrote briefly describing the problem after the
> > discussion at LCA 2017 (and several discussions on the Linux Australia
> > list).
> >
> > As a very brief summary, you need to either make Mailman not modify the
> > messages or have it remove the DKIM signature and change the From: field
> if
> > the sender uses DMARC.
> >
> > To not modify the message it has to not change the subject (a simple
> > configuration option), not change the encoding of the body (which seemed
> > impossible last time I tried it), and have the sender use "relaxed"
> settings
> > so the signature won't be broken WHEN Mailman munges the headers (which
> it
> > will always do no matter what you want).
> >
> > If you remove the DKIM signature you must also change the From: field so
> > that mail using ADSP or DMARC doesn't get rejected by any recipients.
> You
> > can make Mailman only change the From: field for DMARC messages, but that
> > doesn't help people who use ADSP.  Even though ADSP hasn't been
> recommended
> > for some years it was still being used by some large hosting companies
> last
> > time I checked. If you configure Mailman to change the From: field when
> > DMARC is used then that encourages senders to use DMARC which breaks
> things
> > for list servers that just strip DKIM headers.
> >
> > Samba.org is one noteworthy domain in our community that uses DMARC.
>
>
> --
> lca2018-chat mailing list
> lca2018-chat at lists.lca2018.linux.org.au
> http://lists.lca2018.linux.org.au/mailman/listinfo/lca2018-chat
>



-- 
Shaun Walker
shaun at theshaun.com
http://www.theshaun.com
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