4.28.5-2 and the zip of death

[Brett Moss]

hello,
i am curious about the default setting in 4.28.5-2 for
Maximum Archive Depth = 3
i tested the new version with the zip of death and the
message took about 7 minutes to process while a
message with Worm.Bagle.Gen-zippwd took a few seconds.


the machine runs a p3 500 and 320M RAM redhat 8 clamav
and mcafee 

do many zip files contain a virus a few layers down?
am i safe to lower this 3 to 1 or 2? 
i'm a bit concerned about bringing a server to its
knees with a coordinated zip of death mail attack.
am i worried about nothing?

thanks,
brett

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