We’re excited to announce the release of SMTP DANE and MTA‑STS connector modes in Exchange Online. This update gives administrators explicit control over how strictly Exchange Online enforces modern ...
Published Mar 10, 2026
Version 1.0
Blog Post
The protocols are already highly secure, so there's no need to create any connectors or modify anything on the shipping side.
In short, these are two options to use only if our partner has incorrectly configured DNS records or certificates.