Not dropping

[Robert Bartlett]

Can anyone help me out? I cant seem to get the script to work. Basically all
I want is to drop the email if it is over a certain amount of points that
Spamassassin reports. I tried:

/^X-Spam-Hits:.*/
if ($MATCH >= '15')
{
       to "/dev/null"
}

And I get mailfilter syntax errors. Can anyone help? Still learning this all
so sorry if Im being slow.

Thanks
Robert