For the networkless install testing of ubuntu server, I tried to install all tasks from tasksel on the 20120925 i386 and amd64 server images. Both failed when trying to install postfix:
Sep 26 17:41:03 in-target: dpkg: error processing postfix (--configure):
Sep 26 17:41:03 in-target: subprocess installed post-installation script returned error exit status 75
Sep 26 17:41:03 in-target: dpkg: dependency problems prevent configuration of bsd-mailx:
Sep 26 17:41:03 in-target: bsd-mailx depends on default-mta | mail-transport- agent; however:
Sep 26 17:41:03 in-target: Package default-mta is not installed.
Sep 26 17:41:03 in-target: Package postfix which provides default-mta is not configured yet.
Sep 26 17:41:03 in-target: Package mail-transport-agent is not installed.
Sep 26 17:41:03 in-target: Package postfix which provides mail-transport- agent is not configured yet.
Sep 26 17:41:03 in-target:
Sep 26 17:41:03 in-target: dpkg: error processing bsd-mailx (--configure):
Sep 26 17:41:03 in-target: dependency problems - leaving unconfigured
Sep 26 17:41:03 in-target: Processing triggers for libc-bin ...
Sep 26 17:41:04 in-target: ldconfig deferred processing now taking place
Sep 26 17:41:04 in-target: Errors were encountered while processing:
Sep 26 17:41:04 in-target: postfix
Sep 26 17:41:04 in-target: bsd-mailx
Sep 26 17:41:07 main-menu[330]: WARNING **: Configuring 'pkgsel' failed with error code 1
postfix version seems to be 2.9.3-2ubuntu2
Attaching debug logs from the install
Sep 26 17:41:02 in-target: Running newaliases
Sep 26 17:41:02 in-target: newaliases: fatal: could not find any active network interfaces
Sep 26 12:41:02 postfix/
Sep 26 17:41:03 in-target: dpkg: error processing postfix (--configure):
Sep 26 17:41:03 in-target: subprocess installed post-installation script returned error exit status 75