TopicActive Directory →
Simple definition
MTA-STS allows an area to require TLS for trade SMTP Compatible uphill.
Technical definition
MTA-STS allows an area to require TLS for trade SMTP Compatible and compatible with the company environment, its configuration must be consistent with the network architecture, security policies and capabilities of the equipment concerned.
What is it used for?
reduce the risk of downgrade TLS SMTP.
Practical example
a domain publishes a policy mode of the P.R.I.
Common issues
- Inconsistent configuration
- Compatibility or version
- Incomplete dependency diagnosis
Key takeaway: Always adapt the diagnosis to the product version and the architecture actually deployed.