This reply
MrOrz mark this message contains misinformation
originally written by MrOrz
「第三方很可能針對漏洞竄改信件,操弄政治或社會輿論」這件事情沒有事實根據,網路上除了三立新聞的報導之外,也沒有看到「專家提出質疑」的原文。

根據官方 Gmail API 文件,當使用者同意一個 app 存取自己的 Gmail 之後,該 app 可以讀取 email、用使用者的身份寄信、幫信件加上或拿掉標籤、自動建立篩選器等等,但根本就沒有「修改郵件內文」的功能。

References

Gmail API Guide - Overview
https://developers.google.com/gmail/api/

Gmail API reference: Users.messages: modify,可以看到能送的參數就是 label IDs,無法修改信件內文
https://developers.google.com/gmail/api/v1/reference/users/messages/modify

Gmail API  |  Google Developers

Flexible, RESTful access to Gmail featuresAPI overviewRead and send messages, manage drafts and attachments, search threads and messages, work with labels, setup push notifications, and manage Gmail s

https://developers.google.com/gmail/api/

The content above by Cofacts message reporting chatbot and crowd-sourced fact-checking community is licensed under Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0), the community name and the provenance link for each item shall be fully cited for further reproduction or redistribution.