Similar to OpenPGP
DKIM
DomainKeys Identified Mail
S/MIME
S/MIME
Sender Policy Framework
Sender Policy Framework
ドメインキー
DomainKeys
送信ドメイン認証
Email authentication
Bitmessage
BitmessageBrand Indicators for Message Identification
Brand Indicators for Message Identification
DMARC
DMARC
Inbound Port 25 Blocking
Outbound Port 25 Blocking
POP before SMTP
POP before SMTPSender ID
Sender IDSMTP-AUTH
SMTP認証
バウンスメール
Bounce message
バックスキャッター (電子メール)
Backscatter (email)
正引きで確認された逆引きDNSエントリ
Forward-confirmed reverse DNS
Request for Comments
Request for Comments
ジョークRFC
April Fools' Day Request for CommentsRFC 1149
RFC 1510
RFC 2324
RFC 2550
RFC 2555
Internet Engineering Task Force
Internet Engineering Task Force
CHARGENプロトコル
Character Generator Protocol
DAYTIMEプロトコル
Daytime Protocol
DISCARDプロトコル
Discard Protocol