package qmail 1.06-4 failed to install/upgrade: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 1

[DieNah]

It has created user accounts that I'm now unable to remove... qmaild, qmaip, alias,... I don't remmber what I was trying to install the first time, but I've just tried again to install qmail, and that's what I've got.

Description: Ubuntu 12.04.2 LTS
Release: 12.04
qmail version : 1.06-4

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: qmail 1.06-4
ProcVersionSignature: Ubuntu 3.2.0-40.64-generic-pae 3.2.40
Uname: Linux 3.2.0-40-generic-pae i686
ApportVersion: 2.0.1-0ubuntu17.1
AptOrdering:
 qmail: Install
 qmail-run: Install
 qmail: Configure
 qmail-run: Configure
Architecture: i386
Date: Mon Apr 15 11:44:23 2013
ErrorMessage: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 1
InstallationMedia: Ubuntu 12.04 "Precise" - Build i386 LIVE Binary 20120426-12:41
MarkForUpload: True
SourcePackage: netqmail
Title: package qmail 1.06-4 failed to install/upgrade: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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