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20203005@manabi.city.fukuyama.hiroshima.jp: host ASPMX.L.GOOGLE.COM[142.251.4.27] said: 550-5.7.1 組織のポリシーに反しているため，メールを送受信? 550 5.7.1 ??きません。 - gcdp d75a77b69052e-441ef3b9fd9si54323551cf.2 - gsmtp (in reply to end of DATA command)