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Clarification on the use of Hostnames, Mail Boxes and Mail Domains in the DNS

Document Type Expired Internet-Draft (individual)
Expired & archived
Author Mark P. Andrews
Last updated 1996-11-11 (Latest revision 1996-04-10)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


At the protocol level, DNS domain names and records may contain arbitrary binary data. However, many domain names and records are, or refer to, hostnames, which are restricted by RFCs 952 and 1123 to contain only certain characters. Similar restrictions apply to mail domain names, RFC-821. This document identifies the types of domain names and records which are hostnames / mail domain names, and specifies the circumstances under which validation checks should be performed within the class IN.


Mark P. Andrews

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