procmail and ifile

Hello,

I'm trying to include ifile (for spam filtering) into procmail, but have no
success. When trying my setup from command line, it works. But when used in
.procmailrc, return code is always 1. Why?

Iin .procmailrc I have:

:0w
* ? dm
spam

Script dm:

#!/bin/sh
if [ `/usr/local/bin/ifile -q -v 0 | /usr/bin/head -1 | /usr/bin/awk '{print
$1}'` = "spam" ]; then
        exit 0
else
        exit 1
fi


What's wrong with this setup? Could you please help me?

Thanks

lk

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