Hi Konstantin,

On Fri, 2 Aug 2024 11:54:06 -0400 Konstantin Ryabitsev [off-list ref] wrote:

Not really, for two reasons:

- X-Original-From is widely used, but isn't really a standard header.

In our case, Mailman puts the original address in the Reply-To header.

- From-munging breaks end-to-end attestation, so we consider x-original-from
  and similar headers a potential impersonation attempt and ignore them.

OK.

I would generally say that From-munging isn't a great option for any list that
receives patches. A much better approach is to just not modify the message
headers or message body. This should be possible with mailman.

Unfortunately, I have not found a way to ensure Mailman (v2, at least)
will not modify messages in all cases e.g. in some circumstances it
will modify the To/Cc list.

So, an alternative for us (though considerable more work) is to change
mailing list software.  Mailmanv3 would be an option, but seems overly
complex.  I see vger.kernel.org is now using mlmmj - is that a
reasonable option for us (i.e. is it able to not modify messages but
still have enough features)?  If so any hints about migrating? ;-)
-- 
Cheers,
Stephen Rothwell