The answer appears to be that you can get the 'raw' content of the message - with /$value and you can parse the headers yourself
How to fetch InternetMessageHeaders for messages in SENT box
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Anonymous
How can I fetch the InternetMessageHeaders for sent mail messages in my SENT box using the Microsoft Graph API? I have tried using the following URL: https://graph.microsoft.com/v1.0/me/messages/{id}/?$select=internetMessageHeaders and received the response shown in this image: Reponse in Graph Exploxer.png.
Outlook | Windows | Classic Outlook for Windows | For business
Microsoft Security | Microsoft Graph
2 answers
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(140.8, 20%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EFC%3C/text%3E%3C/svg%3E)
Fred Cox 5 Reputation points2024-05-03T14:47:09.7333333+00:00 -
Vasil Michev 123K Reputation points MVP Volunteer Moderator2024-02-06T09:40:10.2033333+00:00 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.
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Anonymous
2024-02-06T10:09:02.38+00:00 When fetching a thread with multiple messages, how can one identify a reply, forward, or newly composed mail without the internetMessagesHeader?
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Anonymous
2024-02-06T10:12:10.4966667+00:00 I'm able to retrieve emails from the Inbox folder using the following URL: https://graph.microsoft.com/v1.0/me/messages/{id}/?$select=internetMessageHeaders. However, when retrieving messages from the Sent folder, the InternetMessageHeaders are not included in the response.
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