詢問mailserver收發信gmail

請問一下，目前公司環境是有架設mailserver。遇到一個問題想請教~
環境:
1.有用網域 加過SPF "v=spf1 a mx ip4:59.X.X.191 ~all"
2.mailserver對外IP:59.X.X.191 ；192.168.50.155
3.網站對外IP:59.X.X.191；192.168.50.150

請問以下問題
gmail寄送時收信可以找到 但是我要寄給gmail卻無法成功出現我的IP為210.X.X.X不匹配(正確是59.X.X.191)
防火牆上，也有導port到對應相對應的位置

請問我該如何解?還是說我需要把mailserver給予另外一組固定IP 59.X.X.192 在網域上追加設定"v=spf1 a mx ip4:59.X.X.192 ~all"
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The original message was received at Thu, 14 Aug 2025 14:02:27 +0800 from [10.199.216.87]

----- The following addresses had permanent fatal errors ----- <xxxxxxx@gmail.com>
(reason: 550-5.7.26 Your email has been blocked because the sender is unauthenticated.)

----- Transcript of session follows ----- ... while talking to gmail-smtp-in.l.google.com.:
>>> DATA
<<< 550-5.7.26 Your email has been blocked because the sender is unauthenticated.
<<< 550-5.7.26 Gmail requires all senders to authenticate with either SPF or DKIM.
<<< 550-5.7.26
<<< 550-5.7.26 Authentication results:
<<< 550-5.7.26 DKIM = did not pass
<<< 550-5.7.26 SPF [網域] with ip: [203.69.X.X] = did not pass <<< 550-5.7.26 <<< 550-5.7.26 For instructions on setting up authentication, go to <<< 550 5.7.26 https://support.google.com/mail/answer/81126#authentication d2e1a72fcca58-76e321be931si636677b3a.808 - gsmtp
554 5.0.0 Service unavailable
</xxxxxxx@gmail.com>