I just did a fresh installation of The Perfect Server - CentOS 6.4 x86_64 (Apache2, Dovecot, ISPConfig 3) and ISPConfig 3.0.5.1. There are some things that don't work correctly. ISPConfig shows an error in the ISPConfig Mail-Warn - Log panel as follows: Mar 22 11:25:39 pluto amavis[2083]: No ext program for .lha, tried: lha Mar 22 11:25:39 pluto amavis[2083]: Found decoder for .cab at /usr/bin/cabextract Mar 22 11:25:39 pluto amavis[2083]: No ext program for .tnef, tried: tnef Mar 22 11:25:39 pluto amavis[2083]: Internal decoder for .tnef Mar 22 11:25:39 pluto amavis[2083]: Found decoder for .exe at /usr/bin/unrar; /usr/bin/arj Mar 22 11:25:39 pluto amavis[2083]: No decoder for .lha I patched up some of these errors by typing the following commands: yum install lha Can the author please fix the installation guide on step #14 Install Amavisd-new, SpamAssassin And ClamAV? from: yum install amavisd-new spamassassin clamav clamd unzip bzip2 unrar perl-DBD-mysql to: yum install amavisd-new spamassassin clamav clamd unzip bzip2 unrar perl-DBD-mysql lha