/.well-known/mta-sts.txt
DNS: _mta-sts.example.com
https://github.com/mrisher/smtp-sts
- DNS
_mta-sts.example.com. IN TXT "v=STSv1; id=20160831085700Z;"
- HTTP
https://mta-sts.example.com/.well-known/mta-sts.txt
https://github.com/mrisher/smtp-sts/blob/master/mta-sts.md#mta-sts-example-record--policy
/.well-known/mta-sts.txtDNS:
_mta-sts.example.comhttps://github.com/mrisher/smtp-sts
_mta-sts.example.com. IN TXT "v=STSv1; id=20160831085700Z;"https://mta-sts.example.com/.well-known/mta-sts.txthttps://github.com/mrisher/smtp-sts/blob/master/mta-sts.md#mta-sts-example-record--policy