Ldap domain attr subaddress MTA option

Direct LDAP attribute name MTA options:  (LDAP attribute name)
The  MTA option specifies the name of the attribute that controls whether or not the domain supports subaddressing. Subaddress handling will be disabled if the specified attribute has a value of " ", " ", or " ". This option has no default.

See also:
 * subaddressexact Option
 * Direct LDAP attribute name MTA options