送信ドメイン認証

Authentication-Results

Sender Policy Framework

SPFレコード

Received-SPF

Sender Rewriting Scheme

DomainKeys Identified Mail

DKIMレコード

DKIM-Signature

Domain-based Message Authentication, Reporting and Conformance

DMARCレコード

Authenticated Received Chain

ARC-Authentication-Results

ARC-Message-Signature

ARC-Seal

Brand Indicators for Message Identification

ブランドロゴ

BIMIレコード