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IF you are using modern auth, then some app registration and consent would be required:
Send mail using SMTP with authorization
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Naresh kumar
40
Reputation points
Hi Guys,
I have been looking for a solution to send automated mail using smtpclient - 'smtp.office365.com'.
We need to send mail without any user interaction or any admin consent. Is it even possible? (Note: needed authentication for Hybrid scenario - modern authentication) Please let me know if I need to provide any additional details
Thank you in advance
Developer technologies ASP.NET ASP.NET Core
Microsoft Security Microsoft Entra Microsoft Entra ID
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Microsoft Security Microsoft Graph
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Accepted answer
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Andy David - MVP 157.4K Reputation points MVP Volunteer Moderator2024-10-16T11:34:02.5866667+00:00 -
Naresh kumar 40 Reputation points
2024-10-16T11:44:13.42+00:00 Thank you for your response Andy David. Are there any other API which will not require consent and any user interaction (can be automated for sending mail)? If there aren't any please give me a reply.
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Andy David - MVP 157.4K Reputation points MVP Volunteer Moderator
2024-10-16T11:51:02.98+00:00 Any API sending to Azure/Exchange that authenticates is going to require some Admin to allow it. You can of course send messages anonymously or using a connector:
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Naresh kumar 40 Reputation points
2024-10-16T11:54:15.6566667+00:00 Got it Andy David, Thank you
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Ian C 1 Reputation point2024-10-16T10:00:38.75+00:00 Do you mean the .NET SMTPClient?
If so, does this KB article help?
It's an example of sending emails using the .NET SMTPClient with a outbound SMTP service called outMail which also works as a send connector inside O365.
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Naresh kumar 40 Reputation points
2024-10-16T10:04:12.7133333+00:00 Thank you for your response Ian. But the answer you have provided is for basic authentication. I require a solution for modern authentication. I will edit my question above so that it becomes clear of the requirements.
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