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寄給客戶延遲收不到信

1.選擇「系統日誌」-「SMTP郵件」,看Log檔

2.出現Untrusted TLS connection established to gmail-smtp-in.l.google.com[142.250.157.27]:25: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-256) server-digest SHA256,要調整TLS等級

3.選擇「郵件服務器」-「SMTP服務設定」-「進階設定」,伺服器&用戶端的TLS,調成1.3,就可以收到信

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