Aliaswild Channel Option

From MsgServerDocWiki

Wildcard alias lookups (aliaswild)

Setting the aliaswild option on a destination channel causes an address of the form *@domain to be checked in the alias file and database if the regular lookup for localpart@domain fails. This lookup is performed before local parts without domains are checked.

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.