SendMail(message).Request().PostAsync() method doesnot guarentee message delivery?

Question

Im using MS Graph API to send emails using a service account. I have followed the official documentation provided by Microsoft for the same operation https://learn.microsoft.com/en-us/graph/api/user-sendmail?view=graph-rest-1.0&tabs=csharp

Im not able to figure out why SendMail(message).Request().PostAsync() doesnot send email but SendMail(message).Request().PostResponseAsync().GetAwaiter().GetResult() does.

Need help with the reason behind it. Thanks in advance

Answer 1

Hi @Shailesh Bopche

I tested this code snippet and it doesn't seem to be a problem, I can send emails correctly. After the code is working correctly, you still haven't received any mail in outlook?

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Answer 2

Hi @Shailesh Bopche

After testing, I reproduced your problem locally and it is indeed not possible to use C# to call users/{user id} to send mail (testing with postman seems to work). I will submit this bug with the graph product team later, please wait for my update.

Answer 3

Any update?