On Thu, Apr 10, 2014 at 06:03:51AM -0400, Miles Fidelman wrote:
> I'm sure at least some of you have been bitten by the debacle associated
> with Yahoo turning on strict DMARC enforcement (particularly any of you who,
> like me, manage a list server).
One option is to do what the Postfix-users list does:
* Does not attach any footers or otherwise modify the message body.
* Does not modify (tag) the message subject.
Rather, the Postfix list only:
* Sets a new envelope sender
* Adds a Sender: header
* Adds List-mumble: headers
None of these should break DKIM signatures, and so my guess is that
the Postfix-users list continues to work for yahoo.com posters.
Some people are fond of subject tags and footers, but we seem to
get along just fine without them.
--
Viktor.
