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古い技術について—SMTP現代事情つまみ食い— https://speakerdeck.com/azumakuniyuki/gu-iji-shu-nituite-smtpxian-dai-shi-qing-tumamishi-i


https://speakerdeck.com/azumakuniyuki/gu-iji-shu-nituite-smtpxian-dai-shi-qing-tumamishi-i?slide=14

SPF/DKIM/DMARCの関係
{{attachment:Screenshot 2024-02-11 at 18-08-19 古い技術について—SMTP現代事情つまみ食い—.png}}

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