[GIT PULL] capabilities update for v6.19

[Linus Torvalds]

On Thu, 4 Dec 2025 at 20:43, Serge E. Hallyn <serge at hallyn.com> wrote:
>
> The odd thing is, when I send emails to my own gmail account I don't see
> any complaints about DKIM or DMARC, only:
>
> ARC-Authentication-Results: i=1; mx.google.com;
>        spf=pass (google.com: domain of serge at hallyn.com designates 178.63.66.53 as permitted sender) smtp.mailfrom=serge at hallyn.com

Yes, that's what I see the headers say too - but then in gmail if you
go to "show original", it will also say "DMARC: FAIL" at the top. So
gmail seems to internally consider "no dmarc" to be a failure.

Note that it's entirely possible that your email was marked as spam
for random other reasons, but I've seen this thing before with other
cases that don't do the full dkim and dmarc setup. So I think it just
raises the likelihood of email being marked as spam.

             Linus