Ldap expandable MTA option

Direct LDAP attribute name MTA options:  (LDAP attribute name)
The  MTA option specifies the names of user and group  LDAP attributes, by default   and ,  used to define who (in addition to the group or list owner) may view the membership or a group or list; in the context of the MTA, this means  who will get the group or list expanded in response to the SMTP EXPN command.

Supported values for the attribute(s) named by the  MTA option are:



 (which means that the group or list has no specific-to-itself restrictions and all SMTP EXPN commands are performed, unless restricted by general channel or MTA configuration restrictions: see for instance the  channel option), 

 or synonymously, (which means that only authenticated users -- hence users who have an account and provide their password---will be able to expand the group or list), 

 and. 



Unrecognized values are interpreted as.

Note that group or list access controls (e.g., use of attributes such as ,  etc., or an   setting of   ), also impose restrictions on who is allowed to view list membership. All applicable conditions must be met in order for group or list membership to be viewed (expanded)!

See also:
 * Direct LDAP attribute name MTA options
 * alias_expandable Option
 * expandable_default MTA Option
 * ldap_auth_policy MTA Option
 * ldap_auth_url MTA Option
 * ldap_auth_domain MTA Option
 * expnallow Option
 * expndefault Option
 * expndisable Option
 * DISABLE_EXPAND