You should give more info on how you managed to get into this situation. The real problem is that the postdrop group has been removed while it was still in use by dpkg for some statoverride information. Either postfix did drop the group without unregistering the statoverride, or you made a mistake and dropped the group while you shouldn't. Reassigning to postfix in the mean time.
** Package changed: dpkg (Ubuntu) => postfix (Ubuntu) -- 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/910962 Title: installArchives() failed: dpkg: unrecoverable fatal error, aborting: syntax error: unknown group 'postdrop' in statoverride file Error in function: SystemError: E:Sub-process /usr/bin/dpkg returned an error code (2) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/910962/+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
