On 15.10.16 17:33, Petr Bena wrote:
> I started this discussion stating the fact that SPF, DKIM and DMARC
> don't prevent people from being able to spoof your email address.
These mechanisms are not meant to prevent spoofing (and they can't),
just to make it easier to detect spoofing on the receiving end. If the
receiver does not bother checking, decides against checking, or simply
is incapable of checking, the sender can jump through all sorts of hoops
and it won't help. And it might all fall to pieces anyway, based on what
the MUA displays.
I'm not sure I understand what type of discussion you hope to nurture by
stating that A does not prevent B when A was not designed to prevent B.