Performance submitting mass mail messages

Deferred processing of the expansion of the list membership, with or without deferred processing of list posting access controls, and  setting of relevant bits of the    MTA option,  tends to be especially  important to consider for truly large lists.

For controlling and enabling the deferred processing of expansion of membership and/or access controls, see especially the per-list      LDAP attribute (more precisely, the LDAP attribute named by the   MTA option),  as well as the default set via the    MTA  option. For large lists, it is usually desirable to set either the (new in MS 6.3p1) value of   for  , or  equivalently the per-list setting of   for the    attribute;  this allows inline  processing of access controls, while deferring membership expansion. Alternatively, when the access control itself consists of a very large list, it may be desirable to defer the access control processing as  well, as selected via a value of    or the  per-list setting of   for the    attribute.

See also:
 * ldap_use_async MTA Option
 * ldap_reprocess MTA Option
 * defer_group_processing MTA Option
 * Mass mailings