[ih] Various tests

[John Levine]

It appears that Matt Mathis via Internet-history <matt.mathis at gmail.com> said:
>> That's not quite what they said they require:  they limited the
>> requirement to bulk senders.
>
>However, as a small domain that is a client of Mailchimp, we seemed to be
>included.   Nearly all of the pieces were there, once our hosting company
>updated their DKIM credentials, and I walked through Mailchimp's procedure
>to add them to our DNS.

If you're sending through Mailchimp, you're a bulk sender.  They're pretty
good at getting their customers set up.

R's,
John

PS:

>> Finally, note that the From: field rewriting done by mailing lists
>> demonstrates how easy it is to route around DMARC.
>
>I suspect that many (most?) (all?)  fail SPF and or DKIM, but the policies
>are set to none, so the messages get delivered anyhow.

Having been dealing with this for many years, let me just say that is wildly
at variance with my experience.