Identifying user's $HOME for virtual domains

I'm using Maildrop (1.5.2) with vpopmail (5.4-rc1) on FreeBSD 4.4 and 
can't seem to get the script working right. This biggest issue I'm seeing is

I'm quit new to maildrop. Perhaps someone can suggest a solution to what 
I want to accomplish or pointers to docs that will help me with it. 
Here's what I want to do:

If $VHOME/.mailfilter exists then include it in the domain's default 
script then deliver the email. If it doesn't exist, deliver the mail as 
usual using vdelivermail.

The current error I receive is related to the IF statement--it's a 
"syntax error". Here's my current, domain-wide mailfilter file:

VHOME=`/usr/local/vpopmail/bin/vuserinfo -d $EXT@$HOST`
VPOP="| /usr/local/vpopmail/bin/vdelivermail '' bounce-no-mailbox"

if ( $VHOME/.mailfilter )
{
      include $VHOME/.mailfilter
      to "$VPOP"
}
else
{
    to "$VPOP"
}

I plan to add some more complex filtering for spam and virus controls 
but have yet to get past this basic, seemingly simple script.

Can anyone help?



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