On 14 Dec 2017, at 22:09 (-0500), Grant Taylor via mailop wrote:
What happens when a lot of people shoot themselves in the foot and
receivers start giving DMARC less and less credence. Will we then
need something new to convince them that I really do mean what I
publish?
Yes.
It will happen slower with DMARC than it did with SPF because the bar is
high for getting DMARC wrong in just the right way to shoot one's foot
without blowing it off, whereas it is really easy to do with SPF.
Specifically, I've seen incorrect '-all' SPF tails survive for many
months without being fixed, because the legitimate mail being rejected
had an undeliverable sender address (i.e. couldn't deliver OR bounce,
just died.) DMARC errors are more likely to be either mostly harmless or
more like a head-bazooka than a foot-bullet.
--
Bill Cole
b...@scconsult.com or billc...@apache.org
(AKA @grumpybozo and many *@billmail.scconsult.com addresses)
Currently Seeking Steady Work: https://linkedin.com/in/billcole
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