為何信件寄出又被退回

[mao1855]

為何信件寄出又被退回 請告知解決方式 感恩
如下

Unavailable Delivery : Mail was rejected

This is a return mail sent by system automatically, please do not reply this mail.
Your mail can not be delivered successfully due to the reason below:

Response Message :
To: 1213@gmail.com
Subject: RE: 您在 的訂單
Remote host:x.x.x.x
Remote server replied: 550-5.7.26 This mail is unauthenticated, which poses a security risk to the
550-5.7.26 sender and Gmail users, and has been blocked. The sender must
550-5.7.26 authenticate with at least one of SPF or DKIM. For this message,
550-5.7.26 DKIM checks did not pass and SPF check for [gwt.com.tw] did not pass
550-5.7.26 with ip: [x.x.x.x]. The sender should visit
550-5.7.26 https://support.google.com/mail/answer/81126#authentication for
550 5.7.26 instructions on setting up authentication. bv6-20020a056a00414600b006724753efd3si7644366pfb.195 - gsmtp
[/img]

[Arnor]

https://support.google.com/mail/answer/81126#authentication

請設定 SPF 記錄，
參考 https://www.raidenmaild.com/tw/kb/how-to-setup-spf.html
_________________
*若是想問問題的話, 請務必不要塗改任何 IP, 網域資料, 您若不願貼上IP或網域, 請改以電子郵件來詢問. 謝謝您的配合.*
*若是回報疑似軟體的運行或邏輯或資料處理有誤的問題, 小弟很樂意去了解您的情況, 但請務必以最新版來做回報, 如果以郵件詢問, 請參考 http://www.raidenmaild.com/tw/feedback.html 的說明, 最好標題加個 RaidenMAILD 字樣, 才不致會遺漏了您的信唷. 謝謝您的配合^^*
*在版上發文請遵守網路禮儀, 並請持著虛心敘述問題請教他人, 凡發現違反的文, 均一律刪除為優先, 不另行通知喔.
*與使用者教學相長腦力激盪是我輩成就感的來源, 誠心希望您能不吝指教.
*雷電MAILD 知識庫文件 http://www.raidenmaild.com/tw/kb/

素還尊
Team John Long.
Email: arnor@raidenmaild.com
公司網站 http://www.raidenmaild.com/company/

[mao1855]

非常感謝 已解決