I trying to find out if there possible for amavis to use, for example fcrackzip 
,to test attached ziparchive files for virus.

Otherwise put all mail with encrypted files to quarantine.

Had some mail for a couple weeks ago that contained virus in attached zipfiles.
the password was indeed include in mail text, but as I din not stop it the 
recipient foolish use the password open the file and executed som file and 
infected his computer (as I been told).

So now I stop all encrypted attachment, but if I can use some cputime to try 
bruteforce password and test for virus, of course all depends on strength of 
password, but can it be done?

I was thinking of
['zip',  \&do_unzip,      'fcrackzip -l1-5 -u'],

or something like that,  not sure if it will work

/Markus

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