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MARID was an IETF working group in the ''applications'' area tasked to propose standards for E-mail authentication in 2004. The name is an acronym of MTA Authorization Records In DNS. == Background == Lightweight MTA Authentication Protocol (LMAP) 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 DomainKeys. In March 2004, the Internet Engineering Task Force IETF held a BoF on these proposals and as the result of that meeting, chartered the MARID working group. Microsoft's Caller-ID proposal was a late and highly controversial addition to this mix, with the following features: * Use of XML policies with DNS - this was reduced to what is now known as Sender ID * Proposals of an unfriendly takeover of SPF policies by Sender ID * Use of RFC 2822 mail header fields as by DomainKeys (All other LMAP drafts used the SMTP envelope.) * Specific questions and unspecific flame wars about patents and licensing For many the use of RFC 2822 mail header fields is already beyond the ''lightweight'' LMAP limits, because it operates on the SMTP DATA, or in other words the mail. In this sense Caller-ID started outside of its class. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「MARID」の詳細全文を読む スポンサード リンク
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