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Mandatory Tags for DKIM Signatures

Document Type Expired Internet-Draft (individual)
Expired & archived
Author John R. Levine
Last updated 2021-03-08 (Latest revision 2020-08-30)
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This Internet-Draft is no longer active.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:


The DKIM protocol applies a cryptographic signature to an e-mail message. This specification extends DKIM to allow new signature tags that validators are required to evaluate. The first such tag specifies a second signature that must be present for a signature to be valid.


John R. Levine

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