Similar to 送信ドメイン認証

Brand Indicators for Message Identification
Brand Indicators for Message Identification
DKIM
DomainKeys Identified Mail
DMARC
DMARC
Inbound Port 25 Blocking

POP before SMTP
POP before SMTP
Sender ID
Sender ID
Sender Policy Framework
Sender Policy Framework
SMTP-AUTH

バックスキャッター (電子メール)
Backscatter (email)
Exchange ActiveSync
Exchange ActiveSync
10.5インチiPad Pro

1048576
1048576
Bitmessage
Bitmessage
OpenPGP

Outbound Port 25 Blocking

S/MIME
S/MIME
SMTP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 DNS
Base64
Base64▼-1 trends
Internet Message Access Protocol
Internet Message Access Protocol
JSON Meta Application Protocol
JSON Meta Application Protocol
Messaging Application Programming Interface
MAPI
MIME
MIME
Post Office Protocol
Post Office Protocol
PPAP (セキュリティ)

Quoted-printable
Quoted-printable