> * Really fixes DMARC problems That's a matter of opinion. The DMARC-using domains will disagree, I think, as it still means that you are "impersonating" their users (see below), and making DMARC ineffective as a means of reducing spam and phishing. But we'll see about that soon enough.
No, I can see that mail using this hack is delivered into my AOL and Yahoo accounts. I know a people at AOL and Yahoo, and they quietly admit that screwing up mailing lists was not the goal, it's a side effect of a clumsy attempt to clean up after security breaches. See my blog entry at http://jl.ly/Email/aoldmarc.html. The conspiracy theories about Yahoogroups are just that.
Note that these effects, if operational, tend to hurt everybody on the net. Removing yahoo.com, and other domains with "p=reject" policies, entirely from "From" hurts Yahoo! users and people who want to communicate with Yahoo! users, but really, the bad effects will stop there, I think.
The DMARC cartel includes the largest mailbox providers in the world. There may be pockets of the net where you can thumb your nose at them, but in the world I live in, people depend on the lists I run, and it is simply not an option to tell all the Yahoo and AOL users to go away, much though we might think they deserve it.
By the way, in the long run, the plan is to persuade the DMARC crowd to mitigate the damage themselves, if not by dropping inappropriate DMARC policies, by figuring out how to whitelist the 30,000 (Yahoo's count) list and other providers that they've screwed up. One advantage of this hack is that you can just turn it off when you don't need it, much easier than the stuff that puts the list address in the From: line which affects everyone.
Regards, John Levine, [email protected], Taughannock Networks, Trumansburg NY Please consider the environment before reading this e-mail. _______________________________________________ Mailman-Developers mailing list [email protected] https://mail.python.org/mailman/listinfo/mailman-developers Mailman FAQ: http://wiki.list.org/x/AgA3 Searchable Archives: http://www.mail-archive.com/mailman-developers%40python.org/ Unsubscribe: https://mail.python.org/mailman/options/mailman-developers/archive%40jab.org Security Policy: http://wiki.list.org/x/QIA9
