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Mandatory Tags for DKIM Signatures

Document Type Expired Internet-Draft (individual)
Author John R. Levine
Last updated 2021-03-08 (Latest revision 2020-08-30)
Stream (None)
Intended RFC status (None)
Expired & archived
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
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This Internet-Draft is no longer active.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.)