Ldap primary address MTA option

Direct LDAP attribute name MTA options:  (LDAP attribute name)
The  MTA option specifies the name of the user or group LDAP attribute which contains the primary email address for that user or group, by default the   attribute.

Compare with the MTA options that specify the names of LDAP attributes which store email aliases,   which by default names the   attribute (or in the   schema, names the   attribute), and   which by default  names the.

See also:
 * ldap_alias_addresses MTA Option
 * ldap_equivalence_addresses MTA Option
 * Direct LDAP attribute name MTA options