Hi, The archivers list mentioned in ISPConfig 3 user manual are not complete. Amavisd-new will still complain that it could not find such such archivers etc. Those archivers can open more file types and check its content. Here are some extra archivers which I found useful: apt-get install lha p7zip-full unrar-free ripole rpm2cpio ripole means Rip OLE which is MS OLE type document. They are all free.