Glossary: Attacks and Indicators
DKIM (DomainKeys Identified Mail)
Also written: DKIM, dkim=none
A digital signature that a sending domain adds to its email. `dkim=none` means the message carried no signature.
Where the book teaches it
Related terms
SPF (Sender Policy Framework)DMARC (Domain-based Message Authentication, Reporting and Conformance)Authentication-Results