Internet Assigned Numbers Authority

                                                     SMTP MTA Strict Transport Security (MTA-STS)

   Created
           2018-06-21

   Last Updated
           2018-09-28

   Available Formats
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   Registries included below

     * MTA-STS TXT Record Fields
     * MTA-STS Policy Fields

MTA-STS TXT Record Fields

   Registration Procedure(s)

 Expert Review

   Expert(s)

 Unassigned

   Reference
           [RFC8461]

   Available Formats
           [IMG]
           CSV

   Field Name    Description           Reference
   v          Record version     [RFC8461, Section 3.1]
   id         Policy instance ID [RFC8461, Section 3.1]

MTA-STS Policy Fields

   Registration Procedure(s)

 Expert Review

   Expert(s)

 Unassigned

   Reference
           [RFC8461]

   Available Formats
           [IMG]
           CSV

   Field Name     Description            Reference
   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]

   Licensing Terms