Notes about Email Security.
Domain Verify is a free tool by Mailspike.
This tool allows you to check well known systems related to a Domain.
Systems include DMARC and TLS Reporting, as well as many more.
The primary goal of this tool is to raise awareness on the terrible Phishing attacks every organization suffers regularly.
Name Servers Configuration | SMTP Servers | DNSSEC | SPF | DMARC | DANE | TLS | TLS-Reporting | MTA-STS