Re: Uptick in spam

[Ian Smith <ian.w.smith () gmail com>]

But that's not how SPF works.  In SPF, the domain of the envelope header
sender address is checked against that domain's sender policy.  Since
jdlabs.fr has no policy specified, a strict SPF policy at the NANOG server
would have prevented this small issue.

As for the utility of SPF, well.  It's not comprehensive, no one I know
would say that it is.  But it's a bit of a stretch to say that has zero
value.  It would have prevented this latest bit of fun, which seems to have
people upset, so there's *some* value.

-Ian


On Tue, Oct 27, 2015 at 8:40 AM, Jutta Zalud <ju () netzwerklabor at> wrote:

> Am 27.10.2015 13:09, schrieb Ian Smith:
> <snip>
> If it does (which I don't know), it will probably check the SPF record
> of the delivering mailserver, which was not *.jdlabs.fr as far as I can
> see from the mailheaders.
>
> Jutta Zalud