I have a problem with my mail server, have some mails discarded and dont know wich filter is:

2006-07-19 17:20:54 1G3IXM-0003rv-Vh Subject: FW: NUEVA: HP LaserJet 1018
2006-07-19 17:20:54 SMTP connection from [83.21.xx.xx]:4344 I=[207.44.xx.xx]:25 (TCP/IP connection count = 3)
2006-07-19 17:20:55 1G3IXM-0003rv-Vh <= juana.rocha@xxx.com H=(atlrel9.xxx.com) [156.153.xx.xx]:33477 I=[207.44.xx.xx]:25 P=esmtps X=TLSv1:AES256-SHA:256 C$
2006-07-19 17:20:55 SMTP connection from (atlrel9.xxx.com) [156.153.xx.xx]:33477 I=[207.44.xx.xx]:25 closed by QUIT
2006-07-19 17:20:55 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1G3IXM-0003rv-Vh
2006-07-19 17:20:55 1G3IXM-0003rv-Vh => discarded (system filter)
2006-07-19 17:20:55 1G3IXM-0003rv-Vh Completed QT=3s

Anyone knows what filter can discard this message by that way ?

Dont ask me why, but that message is discarded only when this word is on the email body:

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