What about OAuth? Microsoft sunsetting SMTP Auth by Sept 2025

When will OAuth be available for Email authentication? Our IT team notified me that Microsoft has announced the deprecation of Exchange Online Basic Authentication for SMTP Auth (client submission) effective September 2025.

After this date, the SMTP Authorization method Metabase uses to relay email via Microsoft 365 will no longer be supported by Microsoft.

What is the work-around for this? Will Metabase join the more modern authentication method and support OAuth for its users?

we didn't know this was happening, we don't follow microsoft changelogs

Microsoft recommends their Azure Communication Services for sending email with SMTP authentication.

I've found it much easier to just use a 3rd party SMTP server. I use SMTP2Go, the free version provides enough volume for most uses.
Just means modifying your SPF record to allow a new sending server.

Hi,

I wanted to know if there is some update about this topic?

We found that this is going to be an issue in our use case as Exchange Online will permanently remove support for Basic authentication with Client Submission (https://techcommunity.microsoft.com/blog/exchange/exchange-online-to-retire-basic-auth-for-client-submission-smtp-auth/4114750).

Is there any workaround to do this in the future?

Thanks in advance for your help!

The timeline has been changed to Q2 2026.

We will be making this change beginning March 1st 2026 and completing April 30th 2026, (previously September 2025).

Hi all,
any news regarding OAuth2 integration for sending e-mails via MS365/EntraID?

I have a v1.61.3 → Builddate 2026-05-27

at hand and I still see rather regular credential data which don’t appear to support OAuth2 procedures.

Kind regards,

Tom

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