[Exim] Catch -all woes. *: not accepted

Hi

Am using Exim on Linux 7.1 with Webmin as control panel.

No matter where in /etc/aliases I place "*:    username" to enable catch-all
of all domains, if someone sends an email to an 'unrouted' user such as
example12@???, it gets returned with a no 'local user
example12 in myfreedomainhost.net".

Anybody any ideas what I am doing wrong , please?

I have run newaliases, also /etc/rc.d/init.d/exim restart as well - still
nothing.

Thanks