Starting May 5, Microsoft will require DMARC.

Check if your domain is compliant.

The Skysnag Blog

Explore MTA-STS (Mail Transfer Agent Strict Transport Security) and how it improves email security by enforcing encrypted connections between mail servers, reducing risks of interception.
October 11, 2023

What is MTA-STS and how does it Improve Email Security?

Mail Transfer Agent Strict Transport Security (MTA-STS) is a security policy for SMTP servers that is specified in RFC 8461. […]