aliaslookup — Look up mail aliases
aliaslookup [-m module] [address...]
aliaslookup is a command line diagnostic tool that
searches
the Courier's mail alias database
and shows the aliases for the given
address, the actual mail accounts the given
address is aliased to.
Mail addressed to address will be delivered to
the aliased addresses instead.
The optional module is rarely needed.
See
makealiases(8)
for more information.