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Hi Giorgio,
On Wed, Dec 27, 2023 at 09:01:32PM +0100, Giorgio Bonfiglio via uknof wrote:
> It’s in the interest of an ML operator to ensure subscribers do
> get emails - no?
I personally think so, yes, but there is no RFC that says an
Internet mailing list must support or preserve DKIM and not every
mailing list operator has thought about it, or if they have, not all
agree.
If you want to say that it's your opinion that mailing lists need to
preserve DKIM, then that's fine and I agree with you - mailing lists
I operate do.
If you want to say that running a mailing list that invalidates DKIM
signatures will negatively impact deliverability, again I would
agree with you.
I can't speak for the uknof list operators as to why they either
didn't think about it or don't wish to bother with it. I'm just
saying that it's a fact that not everyone agrees with DKIM; not
everyone has spent time on it. Even though it does unavoidably
impact deliverability, these days.
I think we pretty much agree that it would be a good idea not to
invalidate DKIM signatures. I think the only point where we differ
is that you came at this from the point of view that preserving DKIM
is a requirement for running a mailing list. Whereas I am more like,
"well, it impacts deliverability, so…" There is not much to separate
these views. 😀
> Do you disagree with the statement that a server processing a
> DKIM-signed email in ways which break the DKIM signature and still
> not taking action towards it is an (implicit) breach of the RFC?
Which RFC?
The DKIM RFC, RFC6376 tells us what would and wouldn't invalidate a
DKIM signature, but there is no authority external to that RFC that
tells anyone to care about RFC 6376.
Except, I suppose, for the de facto authority of the major mailbox
providers who will more often make such mails disappear.
But as mentioned it is unclear what form if any this mailing list
will continue to exist in and until that is decided it doesn't seem
likely that anyone is going to be changing any list settings.
mailop might be a better venue to talk more about whether Internet
mailing lists in general are required to support DKIM.
https://www.mailop.org/
Though I think the view will still mostly only go as far as
"invalidating DKIM will negatively affect deliverability, so if you
care about that…"
Thanks,
Andy
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