OK Ben.. I'm a litle lost.. I made a post to a list.. not using gmail
or yahoo.. or sbcglobal.. or any of those.. and it bounced from every
single facebook/att/sbsglobal subscriber to the list.. so is it posts
from? or to? or both? and do you see a fix in sight for this new set
of problems? with hotmail et al.. now yahoo et al affected.. that
pretty much decimates many of our email lists.

Thanks..


On 4/10/14, Ben Parker <[log in to unmask]> wrote:

On Tue, 8 Apr 2014 10:40:34 -0700, "Eckstine, Nate"
<[log in to unmask]> wrote:

Is installing DKIM the solution?

No.  The problem is that Yahoo, in their DMARC specification for mail with
a
From: ****@yahoo.com address (and other international variations like
*@yahoo.co.uk, *@ymail.com, *@rocketmail.com, etc.), chose to tell any and
all ISPs that do inbound DMARC/DKIM checking,

"If the mail that says From: *@yahoo.com does not come from our own
servers
(defined by specific IP ranges), not only is it unreliable, and not OK, but
you should not accept it at all, but reject it."

So the ISPs that do inbound DMARC/DKIM checking are not really at fault.
They are simply doing what Yahoo.com has told them to do.  Adding DKIM to
your LISTSERV server won't help because mail with From: *@yahoo.com will
come from the IP of your server which is not (and cannot be) in the IP
range
of acceptable IPs for mail with From: *@yahoo.com to be valid.

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