[Mailman-Developers] Fixing DMARC problems with .invalid munge

[SM]

Hi Stephen,
At 01:07 05-05-2014, Stephen J. Turnbull wrote:
>Nor do I.  I point to the *possibility* and our lack of ability to
>predict effects.  The RFCs have proven over time to give us a system
>that works smoothly.  We have rules of thumb that help to understand
>why they work as well as they do, but the most important one is that
>RFCs must be shown to work in practice before they become Proposed
>Standards.  Ie, don't expect something to work until you see it.

This is a nit.  There isn't any requirement that RFCs have to be 
shown to work in practice  before they become Proposed Standards.

>of the DMARC folks or the sysadmins at Yahoo.  What matters is what
>"just plain folks" think.  Remember, according to AOL, 2% of such

Yes.

>No, that's the whole point.  They will *not* strip the suffix, and
>instead prefix the phishing attack with
>
>     We have repeatedly attempted to reach your email address, but our
>     mail has been rejected due to your ISP's DMARC configuration.
>     Thus we have used the .invalid convention to work around this
>     problem for this important message.

Yes.

Regards,
-sm