MTA Authorization Records in DNS (marid) Thursday, March 4 at 0900-1130 ============================== CHAIRS: Patrik Faltstrom Ted Hardie DESCRIPTION: This meeting will review a set of related proposals for the DNS publication of data which authorizes SMTP senders within a specific domain. The proposals to be discussed vary in the proposed resource record type, syntax, and operation, but all include DNS publication of data intended to allow validation of IP address, envelope, or originator header data for SMTP MTAs. This BoF will be strictly limited to measures related to MTA authentication; no other anti-spam measures or topics will be considered. The BoF will explicitly consider how DNS-based MTA authentication mechanisms would be implemented and deployed, and it will consider the impact on the overall DNS infrastructure of this deployment. This meeting will discuss whether or not an IETF working group is needed to continue work on this topic. AGENDA: Agenda Bashing 5 Problem Overview 35 Taking draft-irtf-asrg-lmap-discussion-01.txt as a starting point, this discussion will focus on the problem these proposals attempt to solve, the broad outlines of the solution space proposed, and the constraints implied by that solution space. Current Proposals (1 hour together) MTAMARK - draft-stumpf-dns-mtamark-01.txt DRIP - draft-brand-drip-02.txt RMX - draft-danisch-dns-rr-smtp-03.txt DMP - draft-fecyk-dmp-01.txt SPF - draft-mengwong-spf-00.txt FSV - draft-levine-fsv-00.txt Implications for the DNS 15 Based on the current proposals, the BoF will discuss how this approach generally and each proposal specifically interacts with the DNS. Implications for SMTP 15 Based on the current proposals, the BoF will discuss how this approach generally and each proposal specifically interacts with existing and proposed mechanisms for mail transfer. Discussion of scope for IETF work 20