On May 06, 2014, at 02:15 PM, Stephen J. Turnbull wrote:

>No, the point is that a phishing mail with
>
>    From: Chase Bank Customer Service <serv...@chase.com.invalid>
>
>will sail right past DMARC, as currently set up.

So too will serv...@chase.com.ru without Mailman ever getting involved, and I
bet that will be just as effective at phishing as .invalid.

Cheers,
-Barry
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