cant install dhcp3 server.... Qmail error

Setting up qmail-run (2.0.2) ...
id: qmaild: No such user
id: qmaild: No such user
Reloaded /etc/qmail/tcp.smtp.
chown: invalid user: `qmaill:qmail'
dpkg: error processing qmail-run (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 qmail-run
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: qmail 1.06-4
ProcVersionSignature: Ubuntu 3.5.0-34.55~precise1-generic 3.5.7.13
Uname: Linux 3.5.0-34-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.3
Architecture: amd64
Date: Sat Jun 22 23:53:33 2013
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: netqmail
UpgradeStatus: No upgrade log present (probably fresh install)