MTA-STS policy service

This site supports Mail Transfer Agent Strict Transport Security (MTA-STS), a standard that helps sending mail servers verify that email destined for this domain is delivered over an authenticated, encrypted connection. It is a technical service endpoint rather than a general-purpose website.

The policy MTA-STS file is found at https://mta-sts.philipcullen.co.uk/.well-known/mta-sts.txt