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A NULL MX Resource Record for Domains that Accept No Mail
draft-delany-nullmx-01

The information below is for an old version of the document.
Document Type
This is an older version of an Internet-Draft whose latest revision state is "Replaced".
Expired & archived
Authors John R. Levine , Mark Delany
Last updated 2014-01-03 (Latest revision 2013-07-02)
Replaced by draft-ietf-appsawg-nullmx, draft-ietf-appsawg-nullmx, RFC 7505
RFC stream (None)
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Additional resources
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:

Abstract

When the 5321.MailFrom domain in an e-mail message has a DNS MX Resource Record (RR), it is making an explicit statement that it is willing to accept email. However, when the domain has just a DNS A or AAAA RR, there mail clients cannot easily tell whether the domain accepts mail, as many hosts on the Internet advertise an A or AAAA RR regardless of whether they want to accept email. The NULL MX RR formalizes the existing mechanism by which a domain announces that it accepts no mail.

Authors

John R. Levine
Mark Delany

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