I followed "How To Install Zimbra Collaboration Suite (ZCS) On Ubuntu" here (thanx for providing this howto!). Everything goes great until halfway step 3. After I answer 'yes' to 'The system will be modified. Continue?' I get this error : Code: Installing packages zimbra-core......zimbra-core_4.5.3_GA_733.DEBIAN3.1_i386.deb...FAILED ###ERROR### zimbra-core_4.5.3_GA_733.DEBIAN3.1_i386.deb installation failed Installation cancelled I downloaded the most recent Debian package from the Zimbra Sourceforge page (not corrupted). The setup is a standard clean Debian Sarge install, with correct MX-record. I don't know where to go from this error, I couln't find a solution on the Zimbra forums or here. Did anyone succeed installing Zimbra on Debian Sarge? Any thoughts on how I can solve this?