大家好,
最近都被gmail退信,錯誤訊息如下:
he original message was received at Wed, 9 Mar 2022 10:36:52 +0800 from xxx.xxx.com.tw [xxx.xxx.xxx.xxx] (may be forged)

----- The following addresses had permanent fatal errors ----- xxx.xxx.xxx@gmail.com
(reason: 550-5.7.26 This message does not have authentication information or fails to)

----- Transcript of session follows ----- ... while talking to gmail-smtp-in.l.google.com.:

DATA
<<< 550-5.7.26 This message does not have authentication information or fails to <<< 550-5.7.26 pass authentication checks. To best protect our users from spam, the <<< 550-5.7.26 message has been blocked. Please visit <<< 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more <<< 550 5.7.26 information. j14-20020a63230e000000b00374109af490si590841pgj.169 - gsmtp
554 5.0.0 Service unavailable

要請大家幫忙是郵件伺服器哪裡設定有錯誤,謝謝大家.