關於「Google SMTP server IP」標籤，搜尋引擎有相關的訊息討論：

外寄郵件伺服器的Google IP 位址範圍support.google.com › answer從印表機、掃描器或應用程式傳送電子郵件support.google.com › answerHow to Use the Gmail SMTP Server to Send Emails for Free - Kinstakinsta.com › Resource Center › Blog › SMTPKey terms – Privacy & Terms - Google's Policiespolicies.google.com › pri