We have been having a fairly extended discussion, much of which seems
hypothetical -
�I don�t like DEMARC because I am worried that ... with mailing lists�. I
wonder if we
could take a moment to try it and see what happens?
We've been running that experiment for at least a year. Surprise!
Until a month ago, nobody noticed because there was, as far as I can
tell, only one person (at Linkedin) posting from a domain with a DMARC
policy.
Then the during April, both Yahoo and AOL published DMARC reject
policies, to try and mitigate their own problems after their
respective security breaches, with the bad effects we've seen. Every
time someone posts to a list from an AOL or Yahoo address, we're
running that experiment whether we like it or not.
R's,
John