Client SMTP Validation (CSV)

Document Type Expired Internet-Draft (individual)
Authors Dave Crocker  , Dave Crocker 
Last updated 2004-06-15
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Expired & archived
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Internet mail relies on exchanges between systems that have made no prior arrangement with each other. For reasons of history and expediency, the current service provides a level of accountability for participating hosts that is no longer adequate. This makes it impossible to vet MTAs or find recourse when their operation causes problems. Client SMTP Validation (CSV) provides an economical service that permits an SMTP server to decide whether messages sent by the client SMTP are likely to be well-behaved, or at least to decide whether the client is sufficiently accountable for its actions. CSV provides a small, simple and useful improvement to Internet mail service accountability. It builds upon the existing practise of service providers that accredit the networks from which sending systems are connecting.


Dave Crocker (
Dave Crocker (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)