On Tue, 14 Sep 2010 02:18:41 +0100, John R. Levine <[email protected]> wrote:
> The final version said > > if a message arrives without a valid Author Domain Signature due to > modification in transit, submission via a path without access to a > signing key, or any other reason, the domain encourages the > recipient(s) > to discard it. Indeed. If an unsigned/invalid message arrives at the MLM, he should discard it. But the case we are considering is where a perfectly validly signed message arrives at the MLM, and then the presumption is that the sender (or the owners of his domain) intend that it should be delivered. > > I think it's a reasonable interpretation to say that if you expect your > list software might break the signature, you're doing the sender a favor > by pre-discarding it since that's what the recipients should do anyway. No, it appears that the MLM has two choices in this situation: 1. Reject of bounce it, with a message of the form "Sorry! We were unable to forward this message to our list for reason XXXX". 2. Use his best endeavours to ensure that it gets delivered. And one of the tools in his "best endeavours" armoury is to change the From: line. -- Charles H. Lindsey ---------At Home, doing my own thing------------------------ Tel: +44 161 436 6131 Web: http://www.cs.man.ac.uk/~chl Email: [email protected] snail: 5 Clerewood Ave, CHEADLE, SK8 3JU, U.K. PGP: 2C15F1A9 Fingerprint: 73 6D C2 51 93 A0 01 E7 65 E8 64 7E 14 A4 AB A5 _______________________________________________ NOTE WELL: This list operates according to http://mipassoc.org/dkim/ietf-list-rules.html
