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SPF/DKIMのメモ

Posted at

どちらもメールの送信者を検証する仕組みだが、微妙に違う箇所があるのでメモ
特にFromとReturn-Pathを別にしている場合に注意が必要

SPF

  • (受信者が)Return-Path(RCPT TO) に指定されたドメインを見る
    • Fromではない
  • 正しく設定しておかないとGmailではユーザアイコンが「?」になる

DKIM

  • (署名者が)From に指定されたドメインを見る
  • 正しく設定しておかないとGmailではメールの横に赤い鍵マークが出て警告される
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