On Tue, 20 May 2008, ned+ietf-smtp(_at_)mrochek(_dot_)com wrote:
There are likely to be cases within a domain where a client wants to get
his address "signed" with BATV but where you don't want to hand out the
shared secret (or private key for that matter) to the client. As such, a
missing component here is a on-wire way to ask some agent to form this
signing operation. The obvious place to have this is as an SMTP eubmit
extension, although of course other approaches are possible.
The usual approach would be to make this implicit by configuring the
client to use a submission server that adds the tag. I'm not sure why
you'd need or want any explicit signalling.
f.anthony.n.finch <dot(_at_)dotat(_dot_)at> http://dotat.at/
SOLE: SOUTHEASTERLY 5 TO 7, VEERING WESTERLY 4 OR 5 LATER IN WEST. MODERATE OR
ROUGH. OCCASIONAL RAIN. MODERATE OR GOOD.