[UFO Chicago] Any Postfix gurus out there?

[Greg Groth]

I'm trying to determine if there is a way to place a catch-all account 
in the aliases db.  I'm only running email for a single domain, so I'm 
not doing anything with the virtual domain files.  My problem is that my 
current setup is rejecting email for spam that is addressed to 
non-existent users.  Normally this would not be a problem, but when the 
email is rejected, it's ending up on my back-up email server in the 
administrative account for the back-up server.  I'd rather have postfix 
accept everything with a wildcard, and send the spam off to /dev/null. 
I know that in Sendmail it's simply a matter of adding the following to 
aliases:

@somedomain.com		/dev/null

But postaliases complains if I attempt the same in the postfix aliases 
file.  Any ideas on how I can pull this off?  Googling came up with 
nothing except when using the virtual domain files.

Best regards,
Greg Groth