Hi Roman Thanks for taking the time to report this bug and helping to make Ubuntu better.
Looks like you system was not configured with a valid hostname and domain name - as a result the postfix configuration is broken which is why you keep seeing this issue. You can fix this by editing /etc/postfix/main.cf - look for the myhostname parameter; run the following commands in a terminal to fix the file and then complete the installation. sudo vi /etc/postfix/main.cf sudo dpkg-reconfigure postfix sudo apt-get -f install or you could configure your system with a valid host and domain name - but that is a little more complicated. If this resolves your issue please mark the bug report as 'Invalid' Thanks ** Changed in: postfix (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to postfix in Ubuntu. https://bugs.launchpad.net/bugs/811948 Title: package postfix 2.8.2-1ubuntu2.1 failed to install/upgrade: el subproceso instalado el script post-installation devolvió el código de salida de error 75 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/811948/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs