Incoming SMTP in the year 2017 and absence of DKIM

William Herrin bill at
Wed Nov 29 17:09:29 UTC 2017

On Wed, Nov 29, 2017 at 12:03 PM, Eric Kuhnke <eric.kuhnke at> wrote:

> For those who operate public facing SMTPd that receive a large volume of
> incoming traffic, and accordingly, a lot of spam...
> How much weight do you put on an incoming message, in terms of adding
> additional score towards a possible value of spam, for total absence of
> DKIM signature?

Zero. DKIM for mailing lists is a horribly broken design and legitimate
mailing lists are second only to spam in quantity of SMTP transactions.

Bill Herrin

William Herrin ................ herrin at  bill at
Dirtside Systems ......... Web: <>

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