MARID
MARID was an
Background
Lightweight MTA Authentication Protocol (LMAP)[1] was a generic name for a set of 'designated sender' proposals that were discussed in the ASRG in the Fall of 2003, including:
- Designated Mailers Protocol (DMP)
- Designated Relays Inquiry Protocol (DRIP)
- Flexible Sender Validation (FSV)
- MTAMARK
- Reverse MX (RMX)
- Sender Policy Framework (SPF)
These schemes attempt to list the valid IP addresses that can send mail for a domain. The "lightweight" in LMAP essentially stands for "no crypto", as opposed to
Controversy
Microsoft's Caller-ID proposal was a late and highly controversial addition to this mix. It came with the following features:
- Use of XML policies with DNS - this was reduced to what is now known as Sender ID
- Piggybacking and extension of the existing SPF
- Use of RFC 2822 mail header fields as by DomainKeys (All other LMAP drafts used the SMTP envelope.)
- Specific questions about patents and licensing [4]
Proceedings
The working group decided to postpone the question of RFC 2821 SMTP identities - i.e.
Less than a week after the publication of a first mfrom or MAIL FROM draft, the WG was terminated unilaterally by its leadership. MARID existed only seven months, and no RFCs were published.[5][4]
The responsible IETF Area Director agreed to sponsor the publication of some of the unfinished MARID discussions as IETF experiments; these happened in 2005, as both the pre-MARID SPF[6] and Sender ID[7] were approved as experimental RFCs. The latter is to a certain degree a result of MARID, growing out of the Caller-ID proposal.
The ongoing disputes on technical issues and incompatibilities in Sender ID resulted later in appeals
References
- ^ Lightweight MTA Authentication Protocol (LMAP) Discussion and Comparison
- ^ "How to Read DMARC Reports?". powerdmarc.com. Retrieved 2023-07-25.
- ^ MTA Authorization Records in DNS - MARID charter Retrieved 25 July 2023
- ^ a b Levine, John R. "An analysis of Microsoft's MARID patent applications". John R. Levine. Retrieved 15 May 2019.
- ^ Seltzer, Larry (22 September 2004). "Internet Task Force Shuts Down Anti-Spam Working Group". eWeek. Retrieved 15 May 2019.
- ^ Sender Policy Framework (SPF) for Authorizing Use of Domains in E-MAIL, version 1
- ^ Purported Responsible Address in E-Mail Messages
- ^ Mehnle, Julian (August 25, 2005). "Appeal: Publication of draft-lyon-senderid-core-01 in conflict with referenced draft-schlitt-spf-classic-02". Archived from the original on August 22, 2009.
External links
- Historical ASRG LMAP draft (2004)
- MARID status page (2004) and mxcomp list archive
- IESG applications area DEA directorate (dissolved)
- IAB appeal with links to more sources (2006)
- SenderID appeal history (2006)