On 08/20/2015 10:13 AM, Richard wrote:
> 
> However, what is really annoying is that it takes the original From:
> line and puts it on the Reply-To: line and there's no way to turn this
> off.
> 
> I can't seem to find any explanation of why anyone thinks this is a
> good idea.  Maybe someone here can explain it to me.


It is there to make a "reply" and "reply-all" actions on posts with
munged From: be as consistent as possible with the same action on a
non-munged post, and to expose the poster's address in a header which is
normally displayed by MUAs.


> Below is why I think it's a bad idea.  Why can't we encode the original
> email address in a comment or quoted token on the From: line instead of
> jamming it onto Reply-To?
> 
> This is how I'm seeing mailing list messages now:
> 
>       To: Hal Finkel <[email protected]>
>       cc: [email protected],
>           Commit Messages and Patches for LLVM <[email protected]>
>     From: Lang Hames via cfe-dev <[email protected]>
> Reply-To: Lang Hames <[email protected]>
> 
> The reply-to is going to the sender instead of the list, which is
> making people cc the mailing list in order to get things to go back to
> the list.


And without munging, the same post would be

>       To: Hal Finkel <[email protected]>
>       cc: [email protected],
>           Commit Messages and Patches for LLVM
<[email protected]>
>     From: Lang Hames <[email protected]>

and reply would still go to the sender in From:


> From what I read of DMARC, it's the munging of the From:
> line that is needed in order to have messages pass the DMARC checks.
> To me this makes sense -- the mailing list domain is sending the message
> to the list and the appropriate domain checks need to be made against
> the mailing list's domain, not the original author of the mailing list
> message.


And if you used dmarc_moderation_action instead of from_is_list to munge
the from, only posts From: domains which publish DMARC reject (or
optionally, quarantine) policies would be munged. The policy for
gmail.com in 'none'.


> What I'm not understanding is how DMARC is mandating that Reply-To: go
> back to the original author, and not the mailing list, as is the
> usualy convention: public conversations from a mailing list cycle back
> to the mailing list by default and only fork into a private
> conversation when specifically requested.


If you want this behavior, set the list's reply_goes_to_list to "This
list", then with current Mailman, the above becomes

>       To: Hal Finkel <[email protected]>
>       cc: [email protected],
>           Commit Messages and Patches for LLVM
<[email protected]>,
>           Lang Hames <[email protected]>
>     From: Lang Hames via cfe-dev <[email protected]>
> Reply-To: <[email protected]>

Whether or not to munge Reply-To: to the list address is controversial
and has been argued and flamed multiple times for years. See
<http://marc.merlins.org/netrants/listreplyto.html>.

-- 
Mark Sapiro <[email protected]>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan
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