DomainKeys Identified Mail (DKIM) Development, Deployment, and Operations
DomainKeys Identified Mail (DKIM) allows an organization to claim responsibility for transmitting a message, in a way that can be validated by a recipient. The organization can be the author's, the originating sending site, an intermediary, or one of their agents. A message can contain multiple signatures, from the same or different organizations involved with the message. DKIM defines a domain-level digital signature authentication framework for email, using public key cryptography and using the domain name servic
Informational, not a standard. Published for the record and carrying no standards weight. Worth knowing before citing it as a requirement.
Normative requirements
Every sentence in this RFC carrying an RFC 2119 keyword, with the section it came from. 1 must, 0 should, 1 may.
2.2 Choosing a DKIM Tag for the Assessment Identifier
- MAYDKIM MAY optionally provide a single responsible Agent or User Identifier (AUID)...
- MUSTA receive-side DKIM verifier MUST communicate the Signing Domain Identifier (d=) to a consuming Identity Assessor module and MAY communicate the User Agent Identifier (i=) if present....