S/MIME
Secure Multipart Internet Message Extensions) leverages email certificates to both sign and encrypt email content, ensuring both authenticity and confidentiality.
DMARC
Domain-based Message Authentication, Reporting & Conformance focuses primarily on the authenticity of the domain from which emails originate
CVE
(Common Vulnerability Enumeration) provides a unique identifier for publicly disclosed security vulnerabilities and exposures
CVSS
(Common Vulnerability Scoring System) rates the severity of vulnerabilities