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

[kidd0nne]

Binary package hint: postfix

using Ubuntu 10.04, Lucid Lynx.
subprocess installed post-installation script returned error exit status 75.

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: postfix 2.7.0-1
ProcVersionSignature: Ubuntu 2.6.32-25.44-generic 2.6.32.21+drm33.7
Uname: Linux 2.6.32-25-generic i686
Architecture: i386
Date: Sun Oct 17 20:51:46 2010
ErrorMessage: subprocess installed post-installation script returned error exit status 75
SourcePackage: postfix
Title: package postfix 2.7.0-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 75

[Mathias Gug (mathiaz)]

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

According to the log file:

Running newaliases
newaliases: warning: valid_hostname: numeric hostname: 1
newaliases: fatal: file /etc/postfix/main.cf: parameter mydomain: bad parameter value: 1

It seems that the hostname of the system is invalid. I'd suggest to fix the hostname to be a valid hostname.