为什么发件箱电子邮件在 microsoft graph api 中始终是一个空数组？

Question

I am trying to read my email from Outbox folder.

GEThttps://graph.microsoft.com/v1.0/me/mailfolders/outbox/messages

I'm using mail flow rules to defear the delivery of the messages by 1 minutes, so the email is going to outbox for almost 1 minute before sending the message

The problem is I'm getting an empty array everytime I query for the outbox folder

{
    "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('3bab4ea2-2100-4265-9dee-6aac1adc666a')/mailFolders('outbox')/messages",
    "value": []
}

Is something wrong?

Answer 1

Depends how you send the email eg if you send from Outlook and the client is in Cache Mode then when you use delayed delivery the Message is stored in the Outbox in the OST Cache and not synced to the server so wouldn't be available online (and in the Graph). You might want to test it using OWA instead but with OWA it saves deferred delivery messages to the drafts folder not the Outbox.