install error

Errors were encountered while processing:
postfix
E: Sub-process /usr/bin/dpkg returned an error code (1)

autoinstaller::Functions::build: An error occured while performing build steps

[FATAL]

Exit code: 100
root@dq3:/usr/local/src/imscp-1.2.2# cd
root@dq3:~# echo 'host.domain.tld' > /etc/hostname
root@dq3:~# hostname -F /etc/hostname
root@dq3:~# cd /usr/local/src
root@dq3:/usr/local/src# cd imscp-1.2.2
root@dq3:/usr/local/src/imscp-1.2.2# perl imscp-autoinstall -d

[ERROR]

autoinstaller::Adapter::DebianAdapter::installPreRequiredPackages: Reading package lists...
Building dependency tree...
Reading state information...
aptitude is already the newest version.
debconf-utils is already the newest version.
dialog is already the newest version.
liblist-moreutils-perl is already the newest version.
libxml-simple-perl is already the newest version.
rsync is already the newest version.
wget is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 50 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up postfix (2.11.3-1) ...

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: 114
newaliases: fatal: file /etc/postfix/main.cf: parameter mydomain: bad parameter value: 114
dpkg: error processing package postfix (--configure):
subprocess installed post-installation script returned error exit status 75
Processing triggers for libc-bin (2.19-18) ...
Errors were encountered while processing:
postfix
E: Sub-process /usr/bin/dpkg returned an error code (1)

[FATAL]

Exit code: 100
root@dq3:/usr/local/src/imscp-1.2.2#