Have you seen this problem? Postfix fails to install because the hostname has a trailing dot. The basebox already has this in /etc/hosts... a change in the basebox or something else. I can manually fix it by removing the trailing dot from /etc/hosts, /etc/mailname and /etc/postfix/main.cf Log: err: /Stage[main]//Package[postfix]/ensure: change from purged to latest failed: Could not update: Execution of '/usr/bin/apt-get -q -y -o DPkg::Options::=--force-confold install postfix' returned 100: Reading package lists... Building dependency tree... Reading state information...