On 3/3/25 12:30 PM, Matt Corallo via NANOG wrote:
On 3/2/25 6:46 PM, Bryan Fields wrote:
There are two other options:
1. Rewrite the from for all messages
2. Implement ARC https://arc-spec.org/
Option one is a bit like a shotgun approach, but it works across all
providers, and is well understood. A number of other lists in our
industry do it with little issue; the -nsp lists and outages to name
a few. A receiver can view the headers and see if it's signed/valid
along the way.
Option two is outside the scope of migration, but arguably could be
the best as it directly solves the issue. Google does implement it.
The footer is a bit redundant, as mailman3 has the direct link in the
"Archived-At:" header now. I'd propose removing the footer and
subject prefix, and investigate implementing ARC now that we can
support it on mailman3. Keep in mind there's over 12k people on this
list, so performance is a bit of concern.
What do others think of this?
Personally, I always liked that DKIM stayed valid through NANOG. It
meant that mail sent to NANOG was evaluated mostly by the actual
sender, and not by the list itself, which seems much better than lists
laundering senders from the PoV of spam filters.
In theory, at least. Unfortunately all of that logic is proprietary
especially by the big mailbox providers so it's really hard to say
what's happening under the hood. It would be nice to know how it's being
used in real life, but I'm not aware of any papers that describe it
(feel free if anybody knows some).
Mike
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