On 04/08/2014 10:56 PM, Al Iverson wrote:
On Tue, Apr 8, 2014 at 3:40 PM, Rolf E. Sonneveld
<[email protected]> wrote:
On 04/08/2014 06:06 PM, Al Iverson wrote:
With feedback from Franck Martin and Sam Silberman, I modified my
mailing list manager to rewrite the from address to be the list
address, if the user posting is from a domain with a restrictive DMARC
policy setting. It seems to be working well, so I've rolled it out to
the production version that I use for my active lists. Probably took
2-3 hours total to work through a couple different iterations to come
to that end.
I decided I didn't want to cause my subscribers pain since there was a
way for me to just deal with it on the back end.
You may have solved the problem for some of your subscribers, but
simultaneously have introduced a new problem for all subscribers: MS
Exchange (and I'm sure there are other mail servers doing this as well) send
out of office replies to the header From address... [1] So you can wait for
complaints about out of office messages being sent to your lists.
I think this might be out of scope for the DMARC discussion list,
though I agree that the problem exists. What this changes is where the
unwanted notifications go; it does not actually cause the
notifications. Also, in this scenario, with the out of office
notifications going to the mailing list manager software, it could in
theory be configured to filter out such messages, providing an even
better user experience than before this exercise began. Now nobody
would receive the unwanted notification, instead of somebody.
But again, I still think this might be out of scope for DMARC
specifically, at that point... so I don't know that it merits further
discussion in the realm of DMARC.
It might seem out of scope for DMARC, but it demonstrates that
circumventing problems caused by DMARC policies introduce other problems
(which in turn can be circumvented, but might introduce other problems
etc.).
/rolf
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