Hello John, what you're missing -- and its easy to miss -- is that Yahoo has an outstanding offer to help developers (this means $!) fix things.

Really, that makes no difference. I don't want Yahoo or anyone else to pay us to screw up our mail software to work around them -- I want them to spend their money to fix things so we don't have to.

Yahoo, in their own blog, estimates there are 30,000 mail systems that they have damaged by their DMARC actions. I would be surprised if there were more than a few hundred mail systems acting on DMARC policies, although some of those are very, very large. Is it that hard to understand why someone might think it was unreasonable to demand that the 30,000 make changes of no benefit to themselves, rather than the few hundred fix their buggy fussp?

The 30K estimate is probably low, since there are likely many small mail systems they aren't aware of but that they are damaging. For example, yesterday a middle school teacher who found my old Dummmies web site wrote to me out of the blue to say that his web form that lets students and parents send mail to him stopped working for AOL and Yahoo addresses, which just disappear. It took about two seconds to figure out what was wrong when he told me that his script sends mail to his Gmail account. I told him what was wrong, and he did a hack that sticks in a fake From: address, so the mail gets through but now his script works worse since he can't write back without extra effort. If he hadn't written to me, he'd probably never have figured out what was wrong. These are real people who are really hurt by the two providers' actions.

Regards,
John Levine, [email protected], Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail.

PS: Here endeth the rant.

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