This guidance explains how common security standards apply to secure email.
Read this guidance to understand how Domain-based Message Authentication, Reporting & Conformance (DMARC), DomainKeys Identified Mail (DKIM), Sender Policy Framework (SPF) and Transport Layer Security (TLS) are used in email security.
19 February 2016
Government Digital Service
Don’t include personal or financial information like your National Insurance number or credit card details.