склонный - добираются, автоудаляют ошибку возвратов

Можно ли сказать мне точную проблему в этом результате?Спасибо.

user@user-OptiPlex-760:~$ sudo apt-get autoremove

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED
  linux-headers-4.4.0-21 linux-headers-4.4.0-21-generic linux-image-4.4.0-21-generic linux-image-extra-4.4.0-21-generic
0 to upgrade, 0 to newly install, 4 to remove and 1 not to upgrade.
2 not fully installed or removed.
After this operation, 295 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 245902 files and directories currently installed.)
Removing linux-headers-4.4.0-21-generic (4.4.0-21.37) ...
Removing linux-headers-4.4.0-21 (4.4.0-21.37) ...
Removing linux-image-extra-4.4.0-21-generic (4.4.0-21.37) ...
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 4.4.0-21-generic /boot/vmlinuz-4.4.0-21-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 4.4.0-21-generic /boot/vmlinuz-4.4.0-21-generic
update-initramfs: Generating /boot/initrd.img-4.4.0-21-generic
run-parts: executing /etc/kernel/postinst.d/pm-utils 4.4.0-21-generic /boot/vmlinuz-4.4.0-21-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 4.4.0-21-generic /boot/vmlinuz-4.4.0-21-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 4.4.0-21-generic /boot/vmlinuz-4.4.0-21-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 4.4.0-21-generic /boot/vmlinuz-4.4.0-21-generic
Generating grub configuration file ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Found linux image: /boot/vmlinuz-4.4.0-34-generic
Found initrd image: /boot/initrd.img-4.4.0-34-generic
Found linux image: /boot/vmlinuz-4.4.0-31-generic
Found initrd image: /boot/initrd.img-4.4.0-31-generic
Found linux image: /boot/vmlinuz-4.4.0-21-generic
Found initrd image: /boot/initrd.img-4.4.0-21-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
done
Removing linux-image-4.4.0-21-generic (4.4.0-21.37) ...
Examining /etc/kernel/postrm.d .
run-parts: executing /etc/kernel/postrm.d/initramfs-tools 4.4.0-21-generic /boot/vmlinuz-4.4.0-21-generic
update-initramfs: Deleting /boot/initrd.img-4.4.0-21-generic
run-parts: executing /etc/kernel/postrm.d/zz-update-grub 4.4.0-21-generic /boot/vmlinuz-4.4.0-21-generic
Generating grub configuration file ...
Warning: Setting GRUB_TIMEOUT to a non-zero value when GRUB_HIDDEN_TIMEOUT is set is no longer supported.
Found linux image: /boot/vmlinuz-4.4.0-34-generic
Found initrd image: /boot/initrd.img-4.4.0-34-generic
Found linux image: /boot/vmlinuz-4.4.0-31-generic
Found initrd image: /boot/initrd.img-4.4.0-31-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
done
Setting up postfix (3.1.0-3) ...

Postfix configuration was not changed.  If you need to make changes, edit
/etc/postfix/main.cf (and others) as needed.  To view Postfix configuration
values, see postconf(1).

After modifying main.cf, be sure to run '/etc/init.d/postfix reload'.

Running newaliases
newaliases: warning: valid_hostname: numeric hostname: 10.100.100.4
newaliases: fatal: file /etc/postfix/main.cf: parameter mydomain: bad parameter value: 10.100.100.4
dpkg: error processing package postfix (--configure):
 subprocess installed post-installation script returned error exit status 75
dpkg: dependency problems prevent configuration of mailutils:
 mailutils depends on default-mta | mail-transport-agent; however:
  Package default-mta is not installed.
  Package postfix which provides default-mta is not configured yet.
  Package mail-transport-agent is not installed.
  Package postfix which provides mail-transport-agent is not configured yet.

No apport report written because the error message indicates it's a follow-up error from a previous failure.
                                                                                                            dpkg: error processing package mailutils (--configure):
 dependency problems - leaving unconfigured
Processing triggers for libc-bin (2.23-0ubuntu3) ...
Errors were encountered while processing:
 postfix
 mailutils
E: Sub-process /usr/bin/dpkg returned an error code (1)