收到 5xx 錯誤訊息時疑難排解 SMTP over TLS
550:Denied by policy. TLS conversation required. The appliance receives this message if the onward mail server does not use TLS but the appliance enforces it. 554:Certificate rejected over TLS. The appliance receives this message if the onward mail server fails
退信提示：“SMTP error， OPEN：550 Denied by policy.”
退信提示：“SMTP error， RCPT TO：550 rc：bl access denied 。” 退信提示：“SMTP error， RCPT TO：551 5.7.1 Go away!” 退信提示：“The message was rejected because it contains prohibited virus or spam content” 免費試用 購買咨詢
收到 5xx 錯誤消息時對 SMTP over TLS 進行故障排除
550:Denied by policy. TLS conversation required. The appliance receives this message if the onward mail server does not use TLS but the appliance enforces it. 554:Certificate rejected over TLS. The appliance receives this message if the onward mail server fails
SMTP 錯誤參考資料
550， “5.7.1”， The user or domain that you are sending to (or from) has a policy that prohibited the mail that you sent. Please contact your domain administrator for further details. (您要傳送或是用來發送郵件的使用者帳戶或網域設有禁止這封郵件的政策。
Error: 550 Administrative prohibition
Solution The sender’s email address or domain has triggered a Blocked Senders Policy， or there’s a SPF hard rejection. The Block Sender Policy on the recipient mail server needs to be deleted or modified to exclude the sender address.
How to fix FTP Server (Ubuntu)
– error message :ftp$ put local_to_server.txt local: local_to_server.txt remote: local_to_server.txt200 PORT command successful. Consider using PASV.550 Perm
郵件系統常見錯誤代碼解釋 @ 挨踢人 :: 痞客邦
7 安全或郵件監控規則(Security or Policy) 配合 b 位置的數字，進一步解釋郵件傳送不成功的原因 注意事項：第一個字符為 4 或 5 4.X.X 代表暫時錯誤，郵件服務器將稍後再試 5.X.X 代表郵件傳送失敗 X.1.X 表示郵件地址(Address)問題 X.1.0 Other address status
550 denied by policy， need help
13/5/2006 · Topic: 550 denied by policy， need help « previous next » + Print Pages: [1] Go Down 550 denied by policy， need help 2 Replies 10938 Views w_mardian 550 denied by policy， need help « on: May 11， 2006， 01:40:25 PM » Dear All
Solved: Exchange SMTP Error 550 5.7.1 Unable To Relay
29/1/2021 · Exchange server uses Simple Mail Transfer Protocol (SMTP) to send emails from an email client to the server and vice versa. It is responsible for sending data over the network. In Exchange， after enabling the IMAP or POP3， you must configure the authenticated
郵件發送退信分析大全/SMTP error， RCPT TO: 550 Relay …
評論 # re: 郵件發送退信分析大全/SMTP error， RCPT TO: 550 Relay Deny 2013-12-16 11:39 王光亮 其實我們是可以永久解決這些退信的問題，免費測試看效果，具體技術問題可以加QQ詳聊1961872995 回復 更多評論 # re: 郵件發送退信分析大全/SMTP error， RCPT TO: 550 Relay Deny 2013-12-16 11:40 王光亮
