Similar to Sender_Policy_Framework
DKIM
DomainKeys Identified Mail
Sender Policy Framework
Sender Policy Framework
送信ドメイン認証
Email authentication
Brand Indicators for Message Identification
Brand Indicators for Message Identification
DMARC
DMARCOpenPGP
POP before SMTP
POP before SMTP
S/MIME
S/MIMESMTP-AUTH
ドメインキー
DomainKeys
MIME
MIME
Post Office Protocol
Post Office Protocol
Quoted-printable
Quoted-printableSMTP
Simple Mail Transfer Protocol
SMTPS
SMTPS
UTF-7
UTF-7Bitmessage
Bitmessage
Inbound Port 25 Blocking
Outbound Port 25 Blocking
Sender ID
Sender ID
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
Base64
Base64
Exchange ActiveSync
Exchange ActiveSync
Internet Message Access Protocol
Internet Message Access ProtocolJSON Meta Application Protocol
JSON Meta Application Protocol