Not detecting some instances of viruses

Martin Hepworth martinh at
Sat Nov 4 09:28:28 GMT 2006

Jon Bates wrote:
> I'm having trouble whereby only SOME instances of the same virus are being
> identified by ClamAV.
> The virus is exactly the same type every time, but only some get detected -
> the rest are sent on to the user!
> There is no pattern that I can see - Zip files (containing infected exe),
> and plain exe files have been allowed through.
> I've subsequently scanned the users mailbox on the server using clamscan,
> and it DOES detect the email! For some reason, when it is scanned when the
> message is received, it's not detected. 
> Any help would be appreciated!
> - Jon Bates

do you 'archive' or quarantine these emails so you can replay then at a 
later date. If not I'd start doing this, so you can debug.

Martin Hepworth
Senior Systems Administrator
Solid State Logic
Tel: +44 (0)1865 842300


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