----- Original Message -----
> From: "Stephen J. Turnbull" <[email protected]>
> To: "Franck Martin" <[email protected]>
> Cc: "Mailman Developers" <[email protected]>
> Sent: Monday, July 8, 2013 2:01:43 AM
> Subject: Re: [Mailman-Developers] Adding DMARC support for Mailman 3
>
> Franck Martin writes:
>
> > If the From: contains the posting email of the mailing list, one
> > would think that the default becomes reply to the list, but this is
> > where Reply-To: can be used.
>
> Most users do not display Reply-To; many cannot (at least not at their
> level of technical skill). This means that they get no indication of
> the author of a message unless the author signs the body of the mail,
> which often isn't done, and is impossible to enforce. So this setting
> is simply unacceptable except on announce/advertising lists (where
> Reply-To is usually set to some other address anyway) and on anonymous
> lists (which as far as I know are relatively rare).
>
> If this option becomes a popular filter on large mail hosts,
> discussion lists (ie, the kind of mailing list that Mailman was
> originally intended to serve) will take a severe, perhaps fatal, blow.
This is speculation, and broad fear of the future...
The current practice for a postmaster is to trust (or not) emails from specific
mailing lists, not who post them to the list. Adding DKIM to the list and
taking ownership will only improve it.
>
> > I hope this helps alleviate concerns.
>
You should really read the code of the patch for MM2 and try it.
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