https://app.knowbase.one/vault/rfc/docid/5317
RFC4870: Domain-Based Email Authentication Using Public Keys Advertised in the DNS (DomainKeys)
Network Working Group M. Delany Request for Comments: 4870 Yahoo! Inc Obsoleted By: 4871 May 2007 Category: Historic Domain-Based Email Authentication Using Publ...
https://app.knowbase.one/vault/rfc/docid/6129
RFC5617: DomainKeys Identified Mail (DKIM) Author Domain Signing Practices (ADSP)
Network Working Group E. Allman Request for Comments: 5617 Sendmail, Inc. Category: Standards Track J. Fenton Cisco Systems, Inc. ...