procmail delivering all mail to a default account?

My primary domain has some mail accounts such as :
person@domain.com

And these send/receive mail fine.

Now a spammer comes and sends mail to :
badperson@domain.com

Right now all those messages are being sent to an account on the system, that is NOT a part of domain.com.
/home/someotheruser/Maildir/new/…

I think there is some old configuration from previous operating systems lingering around that cause this.
I see the message being delivered by procmail :

Apr 4 13:00:19 w00t postfix/local[26195]: 6FF1D1403BE: to=someotheruser@server.hostingcomp.com, orig_to=badperson@domain.com, relay=local, delay=10, delays=0.76/8.7/0/0.74, dsn=2.0.0, status=sent (delivered to command: /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME)

So finally the question :
Where is the command that is telling all unmatched mail to domain.com to go to someotheruser ?
I’ve dug through postfix and mail aliases and not found it. any clues?

thanks,
-m

Found it :

/etc/postfix/virtual :
@domain.com default-domain.com

/etc/aliases :
default-domain.com \someotheruser

Changed aliases and reran postalias and all is good again

-m