如果您在發送郵件後，收到以下類似的訊息：
Domain example.com has exceeded the max defers and failures per hour (5/5 (100%)) allowed. Message discarded.
這代表您的發送郵件功能已被暫時封鎖，封鎖的原因是因為收件者多次拒絕您的郵件。
如果您沒有發送郵件記錄當中的郵件，請登入cPanel重新設置該電子郵件的密碼，並檢查您的所有裝置是否有病毒 / 間諜軟件/ 木馬程式等等。
共享伺服器主機預設有防止濫發垃圾郵件功能，以避免伺服器IP地址被第三方伺服器封鎖，令其他客戶不能發送電郵。
若您帳戶已到達發送郵件失敗的最高次數時，系統將會自動封鎖帳戶的發送郵件功能，直到下一個整點會自動解除。例如收到以上退信訊息的時間是10:45AM，系統便會在11:00AM自動解除封鎖，這時候便可以正常發送郵件。
若您已收到類似的訊息，請不要繼續發送郵件，否則其餘的郵件會被列入延遲和失敗的郵件，請立即登入客戶服務中心，聯繫求助桌Helpdesk
我們建議您登錄cPanel並查看郵件記錄以獲取更多信息：
cPanel登入網址：
- https://cpanel.yourdomain.com > Track Delivery
例子 : 以 example.com 作示範: https://cpanel.example.com
If you receive a message similar to the following after sending the email:
Domain example.com has exceeded the max defers and failures per hour (5/5 (100%)) allowed. Message discarded.
Which means your sending function has been temporarily blocked because the recipient rejected your message multiple times.
If you did not send those email in your email log, please log in to cPanel to reset email account password and use anti-virus AND anti-spyware to scan your devices is it contain virus/Trojan/spyware/Malware.
Shared hosting has spam prevention function to prevent the server IP address from being blocked by a third-party server which affect other customers email deliverability.
If your account has reached max defers and failures per hour, system will block your hosting send out function automatically until the next hour. For example, when the above error message received at 10:45AM, the system will unblock it at 11:00AM automatically, and then you can send emails normally.
If you have already received similar message, please do not keep sending mails, otherwise the rest of the mail will be listed as delayed and failed mail, please login your CS account and submit ticket to helpdesk team for further checking as soon as possible.
We suggest customer to login cPanel and review the email log for more information:
cPanel login page：
- https://cpanel.yourdomain.com > Track Delivery
Take example.com as an example : https://cpanel.example.com