Hello

> >But look here: This is the sending host for the DNG mailing list:
> >
> > Received: from mail.dyne.org (ns3218761.ip-162-19-139.eu [162.19.139.95])
>
>
> I think OVH allows classless delegation or at least setting PTRs for fixed
> IPs. I'd guess it's laziness the reason why it isn't set. The list has no
> DKIM signature, which is another sign of it. However, they have a good SPF
> record.

Aha - now that you mention it:

$ dig +nocmd +short dyne.org txt
"google-site-verification=6FghqJroXIvBY8cutq6ouO0RC-a8qynFu6sJR3S-IbA"
"v=spf1 mx ip4:162.19.139.95/32 ip4:195.169.149.119/32 ip4:213.127.207.66/32 ip4:141.95.83.167/32 ip4:141.95.47.84/32 -all"
"google-site-verification=xUtkCygX3roBSYAEh01x4JWAYzvUarh3igtFGUu99v8"
"google-site-verification=Jl4hhjC5wPXP1owryns13qpeuEksWw_m-8lWNL_Kleg"
"google-site-verification=2XoWrMMTQ7jmgcB_76Y_TQSnWDGhR4e-y_KLqoKOK1Q"

Maybe it is not the spf line that makes a difference here but
the other gunk. I worry that takes us ever closer to changing the E
in email to a G.

Maybe related news, and some more reading:

https://www.jwz.org/blog/2022/08/today-in-google-broke-email/

regards

marc