Include spares2 MTA option

Miscellaneous mapping table MTA options:  (bitmask)
(New in 8.0.) LDAP attribute values associated with originator or recipient address processing may be included in    mapping probes. This is controlled by the   MTA option. This option is bit-encoded, with the bits defined as follows:

Bit 0 is the least significant bit.

The default is 0, meaning that no LDAP spare attribute values are included in   mapping  probes. If inclusion of any spare attribute values is enabled, those spare attribute values are  suffixed to the probe after the optional (see   )  conversion tag value(s). Any spare attribute values enabled are suffixed in order (first a vertical bar and    if enabled,  then a vertical bar and     if enabled, etc.).

Note that spare attribute slots can be assigned to point to attributes already used for other purposes by the MTA. That is, via this mechanism, the    mapping table can in fact be sensitive to the  value of any attribute available to the MTA during the relevant mapping  table probe: just about any recipient or sender attribute likely to be  of interest could be made available to the mapping probe.

See also:
 * include_conversiontag MTA Option
 * ldap_spare_1 MTA Option
 * ldap_spare_2 MTA Option
 * ldap_spare_3 MTA Option
 * ldap_spare_4 MTA Option
 * ldap_spare_5 MTA Option
 * ldap_spare_6 MTA Option
 * FORWARD mapping table
 * include_spares1 MTA Option
 * Miscellaneous mapping table MTA options