[Bug 1036940] Re: package postfix 2.9.3-2~12.04.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 75

[Robie Basak]

*** This bug is a duplicate of bug 625023 ***
    https://bugs.launchpad.net/bugs/625023

Thank you for taking the time to report this bug and helping to make
Ubuntu better.

It looks like the hostname on your system is not set correctly, and this
causes the postfix maintainer script to fail. Try "sudo dpkg-reconfigure
postfix" to change the hostname that postfix is using.

Marking this as a duplicate of bug 625023, because this is another
example of the configuration system allowing invalid values to be
entered.

But this misconfiguration itself isn't really a bug, so see
http://www.ubuntu.com/support/community for pointers on how to get help
on fixing this if you continue to have trouble.

** This bug has been marked a duplicate of bug 625023
   invalid myhostname parameter allowed during configuration

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https://bugs.launchpad.net/bugs/1036940

Title:
  package postfix 2.9.3-2~12.04.2 failed to install/upgrade: subprocess
  installed post-installation script returned error exit status 75

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