How to fetch InternetMessageHeaders for messages in SENT box

Venkatesh Nambiyar 5 Reputation points

How can I fetch the InternetMessageHeaders for sent mail messages in my SENT box using the Microsoft Graph API? I have tried using the following URL:{id}/?$select=internetMessageHeaders and received the response shown in this image: Reponse in Graph Exploxer.png.

A family of Microsoft email and calendar products.
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A Microsoft programmability model that exposes REST APIs and client libraries to access data on Microsoft 365 services.
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  1. Vasil Michev 91,276 Reputation points MVP

    You cannot. Those headers are added by the server(s), only after the message has been sent. The copy of the message stored within the Sent Items folder will not reflect them.