On Apr 7, 2014, at 2:36 PM, John R Levine <[email protected]> wrote: > It occurred to me that I could add some custom code to my signing script > that's called on every list message, so per Al's suggestion, I've now > adjusted things so any message with a yahoo.com address on the From: line is > rewritten to From: "Address redacted" :; > > That seems like the minimum I can do to mitigate the damage. If Yahoo users > find that inconvenient, well, they have options. > Except, if the receiver MTA does not find a domain in the From: it may reject the message or consider it SPAM by default… because it is a know workaround DMARC, and this format is not RFC compliant (even in IEA mode it is discouraged).
It may fix the immediate problem, but I don’t see that as a long term solution.
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