Challenge / Response Interworking (CRI) Framework for Challenge / Response Email Systems
|Document||Type||Expired Internet-Draft (asrg RG)|
|Intended RFC status||(None)|
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SMTP was designed simply to deliver email messages without authenticating sources or senders of email messages. In an affort to reduce spam on the Internet, Challenge/Response ('C/R') email systems were developed to provide a method for validating message origination for an intended recipient. This document defines a Challenge / Response Interworking ('CRI') protocol by proposing the use of SMTP extensions and MIME headers for interoperability of C/R systems. This document also defines a set of guidelines for continued use with existing non-CRI mail systems and clients.
(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)