Tony Hansen; Dave Crocker; Phillip Hallam-Baker (2009). DomainKeys Identified Mail (DKIM) Service Overview. IETF. RFC 5585. https://tools.ietf.org/html/rfc5585. Truy cập ngày 6 tháng 1 năm 2016. "Receivers who successfully verify a signature can use information about the signer as part of a program to limit spam, spoofing, phishing, or other undesirable behaviors. DKIM does not, itself, prescribe any specific actions by the recipient; rather, it is an enabling technology for services that do."