Ubuntu 9.10 is (long) EOL much newer releases come with much newer versions of postfix:
$ rmadison postfix postfix | 2.9.1-4 | precise | source, amd64, armel, armhf, i386, powerpc postfix | 2.9.6-1~12.04.3 | precise-updates | source, amd64, armel, armhf, i386, powerpc postfix | 2.11.0-1 | trusty | source, amd64, arm64, armhf, i386, powerpc, ppc64el postfix | 2.11.0-1ubuntu1.2 | trusty-updates | source, amd64, arm64, armhf, i386, powerpc, ppc64el postfix | 3.1.0-3 | xenial | source, amd64, arm64, armhf, i386, powerpc, ppc64el, s390x postfix | 3.1.0-3ubuntu0.4 | xenial-updates | source, amd64, arm64, armhf, i386, powerpc, ppc64el, s390x postfix | 3.3.0-1 | bionic | source, amd64, arm64, armhf, i386, ppc64el, s390x postfix | 3.3.0-1ubuntu0.3 | bionic-updates | source, amd64, arm64, armhf, i386, ppc64el, s390x postfix | 3.4.10-1ubuntu1 | focal | source, amd64, arm64, armhf, ppc64el, riscv64, s390x postfix | 3.4.13-0ubuntu1 | focal-updates | source, amd64, arm64, armhf, ppc64el, riscv64, s390x postfix | 3.5.6-1 | groovy | source, amd64, arm64, armhf, ppc64el, riscv64, s390x So I'll mark this old bug as invalid. ** Changed in: postfix (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/542307 Title: package postfix (not installed) failed to install/upgrade: subprocess new pre-installation script returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/542307/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs