ContentType Passed in the Request Body Must Either be Text or HTML
As per the Microsoft documentation, the ContentType
value passed in the request Body
can either be Text
or HTML
.
Any other value passed in the request results in an error from Microsoft Office 365 Outlook such as the following:
POST https://outlook.office.com/api/v2.0/me/sendmail returned a response
status of 400 Bad Request
{"error":{"code":"RequestBodyRead","message":"Requested value 'text/xml' was
not found."}}