At present, we are using the S2S application. After obtaining the access_token, whether calling the Zoom email API interface through curl or Postman in the program, it prompts code400. The request interface is/emails/mailboxes/me/drafts. If I use another email instead of me, it will prompt 503 after calling, requesting interface:/emails/mailboxes/svmeeting468@gmail.com /Drafts. svmeeting468@gmail.com It is my account login email, and I am actually my zmail email: svmeeting468@zmail.com May I ask how to handle this situation? If there is already a solution, can you help me send a reference link? And I can successfully call the email configuration, user, account, and group interfaces using me. I’m really puzzled, it’s been a week and it’s seriously delayed the development progress. Yesterday, I contacted customer service to open the Zoom Room application, but it still doesn’t work after opening it! Not for subsequent maintenance either! Our scenario is to use email accounts that have already joined Zoom to send work reminders to our internal personnel, so we need to connect to Zoom email. However, I see that there is no recipient in the Zoom email interface? What do I need to do? How to create an email with raw RFC 2822 formatted and base64URL encoded? Do you have any examples?