Alias single alias option

Per-recipient message copy alias option:  (string)
The  alias option, if set,  forces a separate message copy per recipient (per list member). Thus it can be considered a per-list analogue of the  channel option. It takes string argument, currently ignored, which should be set to the value " ".

In legacy configuration, its analogue is the alias file named parameter.

See also:
 * Alias options
 * Alias file named parameters
 * single Option