[ietf-dkim] DKIM and mailing lists

[Dave Crocker]

J>> At the end, I can't identify the reason why a mailing should add a
>> signature to a message, may be because I didn't understand how third
>> party signature can be used with a signer (i=) different from the
>> message Sender. Also I can't see how MUA could deal with message with
>> multiple From: . It is definitively not a common usage and it will not
>> be accepted by users because it suppose some modification in MUA.
> We should stay away from multiple From: addresses; MUA behavior is
> inconsistent (we have done a few experiments).

Jim,

What do you mean "stay away from"?  Multiple From addresses are legal and gets 
used occasionally, with existing MUAs.

Unless DKIM is going to attempt to change RFC2822 rules, we cannot have DKIM 
fail to handle a legal header case.

d/

-- 

Dave Crocker
Brandenburg InternetWorking
<http://bbiw.net>