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20 Dec 2016

DMARC and message wrapping Email

I have groused at length about the damage that anti-phishing technique DMARC does to e-mail discussion lists. For at least two years list managers and list software developers have been trying to figure out what to do about it. The group that brought us DMARC is working on an un-DMARC-ing scheme called ARC, which will likely help somewhat, but ARC isn't ready yet, and due to ARC's complexity it's likely that there will be many medium or small mail systems that enforce DMARC and can't or won't use ARC.

The Internet Engineering Task Force, which writes technical standards for the Internet, works primarily through discussion lists, and the pain from DMARC has gotten to the point where we may do something about it. So we've been doing some experiments.

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