[Bug 802956] Re: package exim4-base 4.74-1ubuntu1.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[James Page]

Error from log:

Adding system-user for exim (v4)
Setting up exim4-base (4.74-1ubuntu1.2) ...
install: invalid group `adm'
dpkg: error processing exim4-base (--configure):
 subprocess installed post-installation script returned error exit status 1

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https://bugs.launchpad.net/bugs/802956

Title:
  package exim4-base 4.74-1ubuntu1.2 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 1

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