[Bug 687681] Re: package postfix 2.7.0-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 75

[Scott Moser]

It appears that your postfix configuration must have an error in it.  If
you believe that the package caused this or should have handled it
differently, please re-open with more information.

See the output from DpkgTerminalLog.txt:

Setting up postfix (2.7.0-1) ...

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: 1
newaliases: fatal: file /etc/postfix/main.cf: parameter mydomain: bad parameter value: 1
dpkg: error processing postfix (--configure):
 subprocess installed post-installation script returned error exit status 7

** Changed in: postfix (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/687681

Title:
  package postfix 2.7.0-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 75