Mail Transfer Agent Strict Transport Security

This subdomain houses my MTA-STS (RFC 8461) configuration file.

Here is how the record is stored in DNS:

_mta-sts.markdain.net IN TXT "v=STSv1; id=4d5e5b7ba5a45ecb675cde095b7489eb;"

The identifier matches the MD5 of the above text file.