Ldap message quota MTA option

Direct LDAP attribute name MTA options:  (LDAP attribute name)
The  MTA option names the user LDAP attribute,  by default , used to set a user per-message quota (size limit). See also the  MTA option, which names an LDAP attribute storing user disk quota.

See also:
 * ldap_disk_quota MTA Option
 * ldap_domain_attr_message_quota MTA Option
 * defaultmessagequota Store Option
 * Direct LDAP attribute name MTA options