spam filter on jpg attachments

[Zion Ahead]

Exim logs:

2007-04-05 15:07:45 1HZYFE-0003DC-Rr <= sales@mydomain.com H=(mta2.srv.hcvlny.cv.net) [167.206.4.197]:42573 I=[xxx.xxx.122.208]:25 P=esmtp S=9925 id=000801c777be$11815a50$34840ef0$@com T="test" from <sales@mydomain.com> for marco@customer.ca maria@customer.ca
2007-04-05 15:07:45 cwd=/var/spool/exim 3 args: /usr/sbin/exim -Mc 1HZYFE-0003DC-Rr
2007-04-05 15:07:45 1HZYFE-0003DC-Rr => discarded (system filter)
2007-04-05 15:07:45 1HZYFE-0003DC-Rr Completed QT=1s

This only happens when a 4kb jpeg/jpg attachment is sent. Not sure where its getting caught.

My antivirus.exim file attached

I searched for "jpg" and "jpeg" in that file, nothing showed up.

[Zion Ahead]

I would appreciate any one's help on this please

[wa4fat]

discarded (system filter) typically refers to an email filter on the end user's side. I'd guess this particular user has a filter in place which is catching those emails ... that's where you should look first.

[idat]

see /etc/antivirus.exim

here you can find global filters.