SMTP MTA Strict Transport Security (MTA-STS)
2018-06-21
2018-09-28
MTA-STS TXT Record Fields
Expert Review
Unassigned
v
Record version
RFC8461, Section 3.1
id
Policy instance ID
RFC8461, Section 3.1
MTA-STS Policy Fields
Expert Review
Unassigned
version
Policy version
RFC8461, Section 3.2
mode
Enforcement behavior
RFC8461, Section 3.2
max_age
Policy lifetime
RFC8461, Section 3.2
mx
MX identities
RFC8461, Section 3.2