Kevin Fenzi writes:
We don't currently have any ARC setup.
Well, I can't promise it will have great effect, although I know from
the design and implementation discussions that Google takes it
seriously, and Microsoft implements it. So it's just a suggestion for
"your copious free time".
When / if we can get the list processor upgraded, I think newer
versions
of mailman3 have native ARC support, and we could look at enabling
that.
We do, but it's not recommended, and definitely inferior to
implementation in the MTA unless the Mailman host is basically an
administrative domain to itself. I believe Fedora uses OpenDKIM, and
the same folks provide OpenARC at
Https://Trusteddomainproject/Openarc.