js in zip attachment of e-mail

[Thomas Spuhler]

There are a lot of e-mails on the lose with subject "Unpaid invoice # xxxx" 
containing a zipped js (Java Script) I got about 10 of them today.
Is there a way to filter them out using amavisd?

-- 
Best regards
Thomas Spuhler

All of my e-mails have a valid digital signature
ID 60114E63
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