package sendmail-bin 8.14.4-2ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2

I tried to upgrate my ubuntu system from version 10 to 12.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: sendmail-bin 8.14.4-2ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-27.43-generic-pae 3.2.21
Uname: Linux 3.2.0-27-generic-pae i686
ApportVersion: 2.0.1-0ubuntu11
AptOrdering:
 gnome-tweak-tool: Configure
 sendmail-bin: Configure
 mailutils: Configure
 sensible-mda: Configure
 sendmail: Configure
Architecture: i386
Date: Thu Aug 23 03:31:47 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 2
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007.1)
SourcePackage: sendmail
Title: package sendmail-bin 8.14.4-2ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 2
UpgradeStatus: Upgraded to precise on 2012-08-01 (21 days ago)