Zip files not getting checked?

[Keith Chong]

Hi all,
  I am running Mailscanner 3.21 with sophos and it seems to me that zip attachments are not getting scanned.  I had problems with Sobig.E and had to add rules to filename.rules.conf to block it.  Today we were hit with Mimail.A and even after I updated the IDE from Sophos it still was getting through.  I installed all the MIME-Tools patches but that did not help.

Anyone have any idea what i am missing?

I am running Solaris 8 and sendmail.

Thanks
Keith