I tested this again on a clone of one of our other machines which hadn't had it's packaged upgraded.
I ran sudo apt-get update, then sudo apt-get upgrade. The following packages were going to be upgraded: accountsservice apache2-utils apt apt-transport-https apt-utils bash bind9-host cloud-init curl dmsetup dnsutils gir1.2-gudev-1.0 grub-legacy-ec2 icedtea-6-jre-cacao icedtea-6-jre-jamvm iptables language-selector-common libaccountsservice0 libapt-inst1.4 libapt-pkg4.12 libbind9-80 libcurl3 libcurl3-gnutls libcurl4-openssl-dev libdbus-glib-1-2 libdevmapper1.02.1 libdns81 libdrm-intel1 libdrm-nouveau1a libdrm-radeon1 libdrm2 libgnutls-dev libgnutls-openssl27 libgnutls26 libgnutlsxx27 libgudev-1.0-0 libisc83 libisccc80 libisccfg82 liblwres80 libmysqlclient-dev libmysqlclient18 libnspr4 libnss3 libnss3-1d libpciaccess0 libssl-dev libssl-doc libssl1.0.0 libudev0 libvirt-dev libvirt0 libxml2 linux-libc-dev openjdk-6-jre-headless openjdk-6-jre-lib openssl percona-server-client-5.5 percona-server-common-5.5 percona-server-server-5.5 percona-xtrabackup perl perl-base perl-modules postfix rsyslog sudo udev I was presented with a changelog in less, and the upgrades proceeded when i'd closed that. Other packages upgraded without incident, but when postfix was being upgraded I was presented with a pink screen titled 'Postfix Configuration', even though postfix has already been configured. The options included 'No configuration', 'Internet site', 'Internet with smarthost', 'Satellite system' and 'Local only'. As before, the upgrade would not proceed without user input. ** Changed in: postfix (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1169044 Title: can't install/upgrade postfix non interactively through apt To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1169044/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs