Similar to 送信ドメイン認証
DKIM
DomainKeys Identified MailDMARC
DMARCInbound Port 25 Blocking
POP before SMTP
POP before SMTPSender ID
Sender IDSender Policy Framework
Sender Policy FrameworkSMTP-AUTH
バックスキャッター (電子メール)
Backscatter (email)Exchange ActiveSync
Exchange ActiveSync10.5インチiPad Pro
1048576
Bitmessage
BitmessageOpenPGP
Outbound Port 25 Blocking
S/MIME
S/MIMESMTP認証
ドメインキー
DomainKeysバウンスメール
Bounce message正引きで確認された逆引きDNSエントリ
Forward-confirmed reverse DNSBase64
Base64Internet Message Access Protocol
Internet Message Access ProtocolJSON Meta Application Protocol
JSON Meta Application ProtocolMessaging Application Programming Interface
MAPIMultipurpose Internet Mail Extensions
MIMEPost Office Protocol
Post Office ProtocolPPAP (セキュリティ)
Quoted-printable
Quoted-printableSimple Mail Transfer Protocol
Simple Mail Transfer Protocol