For latest updates on HVE, please see this post as well as this post.
Today we’re thrilled to announce the public preview of High Volume Email (HVE) for Microsoft 365. HVE is a new service designed...
Updated May 06, 2025
Version 5.0
Blog Post
Thank you for mentioning that. When I had a support ticket open the person claimed there was no clear information yet provided by microsoft on my ticket.
We are moving all our exchange smtp to the cloud so as you can imagine we want to make sure we get this right. We want to move all our Basic SMTP Auth we use like SQL servers for SMTP to High volume mail smtp auth. So It would be devesting to find out later high volume mail basic smtp auth will also be depreciated after we go down this road.
So It sounds like from what you are saying SMTP Basic Auth will still be supported by High volume Mail, even though you are depreciating it for the old way?