Trying to feed an script with an email

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Trying to feed an script with an email
\ Clodoaldo (28 Mar 2008)
. \ (Wietse Venema) (28 Mar 2008)
. . \ Clodoaldo (29 Mar 2008)
. . . \ Sahil Tandon (29 Mar 2008)
. . . . \ Magnus Bäck (29 Mar 2008)
. . . \ (Wietse Venema) (29 Mar 2008)
. . . . \ Clodoaldo (29 Mar 2008)
. . . . . \ mouss (29 Mar 2008)
. . . . . . \ Clodoaldo (29 Mar 2008)
. . . . . . . \ mouss (29 Mar 2008)
. . . . . . . . \ Clodoaldo (29 Mar 2008)
. . . . . . . . . \ mouss (29 Mar 2008)
. . . \ mouss (29 Mar 2008)
. . . . \ Clodoaldo (29 Mar 2008)

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Subject:	Trying to feed an script with an email
Group:	Postfix-users
From:	Clodoaldo
Date:	28 Mar 2008

I'm trying to process an email with a script. My server's hostname is
fc621199.aspadmin.net.

In main.cf domain.com is in virtual_alias_domains.

In virtual i have this line:
example confirmaporemail_py

In aliases:
confirmaporemail_py: "|/home/carroarodo/confirmaporemail.py"

When i send an email to example it does not find the user:

Mar 28 21:48:30 fc621199 postfix/local[7448]: 5E83710363:
to=<confirmaporemail_py>,
orig_to=<example>, relay=local, delay=0.61,
delays=0.59/0.01/0/0.01, dsn=5.1.1, status=bounced (unknown user:
"confirmaporemail_py")

What am i missing and how to make it work?

Regards, Clodoaldo Pinto Neto