Aliaswild Channel Option
Wildcard alias lookups (
aliaswild option on a destination channel causes an address of the form
*@domain to be checked in the alias file and alias database if the regular lookup for
localpart@domain fails. This lookup is performed before checking in the alias file and alias database for local parts without domains.
The effect of this setting is the same as if bit 2 (value 4) of the
alias_domains MTA option is set; the only difference is that
aliaswild only applies to a specific destination channel.