Non-password ZIPs detected as passworded

[Christopher Schanzle]

Running MS 4.30.3-2 on Fedora Core 1 box.  We've had two instances today
of internal users sending password-protected zips that were blocked
since they were a password-protected ZIP archive.  I wasn't sure I
believed the first user when he said it wasn't protected...but when the
second user sounded like she wouldn't know how to put a password on a
zip, I checked the quarantine.  After decoding the email (mewdecode for
one, uudecode for the other), both archives were unzip-able on the
command line with Zip 2.3.  Listing the archive and extracting the
contents succeeded without error (i.e., no archive corruption).

Any suggestions?  Many thanks!

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