[Exim] scan director is generating duplicate logs

Hi,

I'm getting start with message scanning on exim, this is my director
for scanner:

superscan:
driver = smartuser
transport = superscan_smtp
condition = ${if eq {$received_protocol}{scanned-ok}{no}{yes}}


and the transport:

superscan_smtp:
driver = pipe
command = "/usr/local/bin/superscan"
user = supscan
bsmtp = all
prefix =

The problem is that each message checked by the director generates a
"duplicate" entry in exim mainlog:

2002-11-05 17:52:11 1899k9-0005Su-00 <= root@??? U=root P=local S=297
2002-11-05 17:52:12 1899kC-0005T0-00 <= root@??? U=mail P=scanned-ok S=452 id=E1899k9-0005Su-00@???
2002-11-05 17:52:12 1899kC-0005T0-00 => fabio <fabio@???> D=virtual_local_user T=virtual_delivery
2002-11-05 17:52:12 1899kC-0005T0-00 Completed
2002-11-05 17:52:12 1899k9-0005Su-00 => fabio <fabio@???> D=blackhole T=blackhole_smtp
2002-11-05 17:52:12 1899k9-0005Su-00 Completed

Any suggestions ?


Thanks,

Fabio B. de Paula
fabio@???