I proposed some ideas around DKIM compatibility with mail lists and tried to send here too. Obviously the anti-cross-post feature on mailman- developers@python.org is working well (which on some levels I appreciate).
As leading maillist product I'm keep to know your opinion. This has obviously been mentioned before never quite got momentum[1]. Now that ADSP (RFC 5617) is out it seems that validating domains with a ADSP policy of dkim=all seems rather weak as anything other than a temporary spam bias (until spammers catch on).
My nice controversial idea is to mangle the from: address in mailing lists in general so that the list domain becomes the author (for ADSP purposes) and those DKIM validating emails are given the ability to do more with ADSP than spam biasing.
Original post here http://mipassoc.org/pipermail/dkim-dev/2009- September/000202.html
Other ideas welcome.
[1] http://wiki.list.org/display/DEV/DKIM
-- Daniel Black Infrastructure Administrator CAcert