DKIM Extensions
draft-hallambaker-dkim-extensions-00

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Abstract

A DKIM Policy statement is defined for the policy 'this zone never sends mail'.

Table of Contents

1.  Introduction
    1.1.  Requirements Language
2.  NoMail Policy
3.  Acknowledgements
4.  IANA Considerations
5.  Security Considerations
6.  Normative References
§  Author's Address
§  Intellectual Property and Copyright Statements

1.  Introduction

1.1.  Requirements Language

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 (Bradner, S., “Key words for use in RFCs to Indicate Requirement Levels,” March 1997.) [RFC2119].

2.  NoMail Policy

The NOMAIL policy is declared in an SSP record using the tag "NOMAIL".

No parameters are specified for the NOMAIL policy.

If specified the NOMAIL policy states that no mail is sent from the domain to which it is attached. All mail that purports to have been sent by that domain MUST be considered suspicious.

3.  Acknowledgements

The ideas in this document arose from extensive discussions with the DKIM working group, in particular Hector Santos and others.

4.  IANA Considerations

This document requests allocation of a DKIM SSP tag 'NOMAIL'

5.  Security Considerations

The NOMAIL policy MAY be employed to perform a denial of service attack.

6. Normative References

Author's Address

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