Comment 2 for bug 625023

Hi Cordeyo, thanks for taking the time to file this bug report and work with us to make Ubuntu better!

I believe you have an invalid value int he 'myhostname' field in main.cf:

From DpkgTerminalLog.gz:

newaliases: warning: valid_hostname: misplaced delimiter: xubuntu.hsd1.ga.comcast.net.
newaliases: fatal: file /etc/postfix/main.cf: parameter myhostname: bad parameter value: xubuntu.hsd1.ga.comcast.net.
dpkg: error processing postfix (--configure):
 subprocess installed post-installation script returned error exit status 75

There is a trailing period on the value. Please try modifying that value (you may need to change it in /etc/mailname) and then running this in a terminal:

sudo apt-get -f install

To finish configuring your system.

I do believe that the validation that postfix's configuration system has should have stopped this from getting to this point.

Marking as Triaged, and changing summary to indicate that configuration validation needs to be evaluated and enhanced so that users are informed of any formatting problems at the time that they enter data. Importance is Wishlist.