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. Matt