Forum Discussion
Basic auth
Our problem today is that we have an IIS 6.0 relay smtp with a login and password with the O365 SMTP. (basic authentication) And as a result of the new Microsoft authentication, my SMTP relay serv...
Hello,
I can guess your Windows SMTP Server is using the Option 1 described here
https://learn.microsoft.com/en-us/exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-microsoft-365-or-office-365#option-1-authenticate-your-device-or-application-directly-with-a-microsoft-365-or-office-365-mailbox-and-send-mail-using-smtp-auth-client-submission
If that is the case, that is SMTP Auth and is not going to be disabled just now
See here for latest news https://techcommunity.microsoft.com/t5/exchange-team-blog/basic-authentication-deprecation-in-exchange-online-september/ba-p/3609437
I can guess your Windows SMTP Server is using the Option 1 described here
https://learn.microsoft.com/en-us/exchange/mail-flow-best-practices/how-to-set-up-a-multifunction-device-or-application-to-send-email-using-microsoft-365-or-office-365#option-1-authenticate-your-device-or-application-directly-with-a-microsoft-365-or-office-365-mailbox-and-send-mail-using-smtp-auth-client-submission
If that is the case, that is SMTP Auth and is not going to be disabled just now
See here for latest news https://techcommunity.microsoft.com/t5/exchange-team-blog/basic-authentication-deprecation-in-exchange-online-september/ba-p/3609437
SMTP is still good to go after Basic Auth disable in Oct:
Basic Authentication and Exchange Online – September 2021 Update - Microsoft Tech Community
- Exactly...