[Bug 989802] Re: package postfix 2.9.1-5 failed to install/upgrade: subprocess installed post-installation script returned error exit status 75

[Clint Byrum]

Hi there GillAgain. Error code 75 means that postfix cannot use your
hostname, as it is invalid for email purposes. Check /etc/hostname and
/etc/mailname and see if they have any invalid characters such as _'s in
them. Some home routers return invalid hostnames and cause this problem.

Closing as Invalid.

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

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Title:
  package postfix 2.9.1-5 failed to install/upgrade: subprocess
  installed post-installation script returned error exit status 75

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