Alias spare* alias options

Extra value alias options: (string)
The   alias options  (  = 1,...,18) are analogous to the attributes named by the     MTA options, except with these options the corresponding spare slot is filled in when the alias is expanded. In legacy configuration, the analogous alias file named parameters are.

The spare value slots are intended for site-customizable purposes, to be made known to the MTA (and hence be more easily accessible in MTA LDAP URLs and certain MTA mapping tables, etc.).

See also:
 * Alias options
 * Alias file named parameters
 * ldap_spare_1 MTA Option
 * spare1 Option