On Thu, Apr 20, 2017 at 11:48:04AM -0600, Doug Royer wrote: > I would like to see an extension so that the MUA could contact the > destination server (perhaps their MX record host) and get a users PUBLIC > key. Perhaps (just an idea - no screaming please) a new TXT record type that > points to the domains PubKey server. How's this going to work when the MUA is: - running on a host that's not connected to the 'net - running on a host that can't connect to MX's (because of local firewall rules) - running on a host that can't connect to MX's (because they're unreachable or down) - running on a host that can't connect to MX's (because they no longer exist) - running on a host that can connect to the MX's but can't get the user's public key because the user is no longer valid - and so on There are way too many failure modes here that will render messages that have already been received either temporarily or permanently unreadable. ---rsk