SMTP mail

Question

Hi, I would really appreciate someone helping me with this question.

I have a .net webforms (framework 4.6.1) application that uses smtp to send notifications out via 2 office 365 mail accounts. Our MSP is informing me that this functionality won't work soon as basic authentication is being depreciated by microsoft and I should change things over to use a paid service or update the code to use OAuth. I appreciate that at some point I should update to modern authentication. Now when I have trawled through numerous articles it comes across to me that smtp using basic authentication is not being depreciated and thus my legacy code should still work come the deadline.

thanks in advance for any clarity

Angela

Answer 1

Hello, I'm Diane, an M365 Apps & Services MVP specializing in Outlook.

Our MSP is informing me that this functionality won't work soon as basic authentication is being depreciated by microsoft and I should change things over to use a paid service or update the code to use OAuth. << You need to ask them if they can re-enable SMTP AUTH for your account. If you have admin rights to use powershell, you can change it your self. https://learn.microsoft.com/exchange/clients-and-mobile-in-exchange-online/authenticated-client-smtp-submission

Are you only sending to internal addresses or do you send to internet addresses? This article has options for configuring devices - https://learn.microsoft.com/exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-microsoft-365-or-office-365

If you want to update your code, I recommend the Q&A forums - developers and admins familiar with the process hang out there - https://docs.microsoft.com/en-us/answers/products/office

Answer 2

Much appreciated Diane, I will have a read over these articles. Yes we send to internet addresses.

thanks

Angela

Answer 3

Anna, do you know if there is anything that has to be configured to keep the basic authentication working for smtp once it is depreciated/switched off as a whole or will it just continue to work as is without any intervention. Appreciate any guidance you can give me.

Thanks angela

Answer 4

Hi Anna, thank-you for replying, this is what I thought and read too. So basic authentication for smtp will work for the foreseeable future?

Answer 5

Hi Angela

I'm Anna and I'd be happy to help you with your question. In this Forum, we are Microsoft consumers just like yourself.

Sorry for the trouble this might have caused. It is true that Microsoft is turning off Basic Authentication in Exchange Online for all tenants starting October 1, 2022.

SMTP AUTH will still be available when Basic authentication is permanently disabled on October 1, 2022. The reason SMTP will still be available is that many multi-function devices such as printers and scanners can't be updated to use modern authentication. However, we strongly encourage customers to move away from using Basic authentication with SMTP AUTH when possible.

https://learn.microsoft.com/exchange/clients-and-mobile-in-exchange-online/deprecation-of-basic-authentication-exchange-online

I hope this helps ;-), let me know if this is contrary to what you need, I would still be helpful to answer more of your questions.

Best Regards,

Anna

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