package courier-mta-ssl (not installed) failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Warrick]

I was installing Groupware via Synaptic Packeage Manager.

ProblemType: Package
DistroRelease: Ubuntu 14.10
Package: courier-mta-ssl (not installed)
ProcVersionSignature: Ubuntu 3.16.0-22.29-generic 3.16.4
Uname: Linux 3.16.0-22-generic x86_64
ApportVersion: 2.14.7-0ubuntu6
Architecture: amd64
Date: Sun Oct 26 21:20:17 2014
DuplicateSignature: package:courier-mta-ssl:(not installed):subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2014-10-25 (0 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
SourcePackage: courier
Title: package courier-mta-ssl (not installed) failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to utopic on 2014-10-26 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.