[Mimedefang] ClamAV effectiveness
David F. Skoll
dfs at roaringpenguin.com
Thu Oct 10 12:08:04 EDT 2013
Has anyone noticed that ClamAV does a pretty poor job lately of
catching viruses? Here are a few days' worth of statistics from a
reasonably-busy mail server cluster:
Total messages scanned: 25 814 586
Viruses detected by ClamAV: 32 147
Viruses missed by ClamAV: 137 231
The second number is a count of all ".exe" files, so it's conceivable some
are not viruses, but the vast majority are... the number is off by at most 1%.
It seems that over 80% of the viruses passing through our servers are
completely missed by ClamAV. Opinions? Experiences?
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