Forum Discussion
SMTP with Basic Authentication on Azure
Our application is non-interactively sending E-Mails using SMTP with Basic Authentication on a Office365-Tenant. Microsoft has announced in several posts that it will disable SMTP with Basis Authentication by the 1.Oct 2022. As OAuth Client Credential Flow is not implemented for SMTP yet (see https://docs.microsoft.com/en-us/exchange/client-developer/legacy-protocols/how-to-authenticate-an-imap-pop-smtp-application-by-using-oauth#smtp-protocol-exchange), I don' t see an alternative but to continue using SMTP with Basic Authentication at this time. In several post Microsoft says that SMTP with Basic Authentication will not be disabled if used, or can be re-enabled if it was disabled. However the information is a bit confusing or inconsistent. Question:
Will existing Office365-Tenants be able to re-enable SMTP with Basic Authentication until OAuth Client Credential Flow will be available for SMTP?
Is the same also true for Tenants that are created in future?
1 Reply
SMTP AUTH will still be available when Basic authentication is permanently disabled on October 1, 2022:
Deprecation of Basic authentication in Exchange Online | Microsoft Learn
