package dovecot-postfix 1:1.2.9-1ubuntu6.1 failed to install/upgrade: subprocess installed post-removal script returned error exit status 2

[Matthew Piatkowski]

probably related to my other postfix, gforge bugs posted today:
package postfix 2.7.0-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 75
https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/644538

package gforge-mta-postfix 4.8.2-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 75
https://bugs.launchpad.net/ubuntu/+source/gforge/+bug/644534

its a mess right now

ProblemType: Package
DistroRelease: Ubuntu 10.04
Package: dovecot-postfix 1:1.2.9-1ubuntu6.1
ProcVersionSignature: Ubuntu 2.6.32-24.43-server 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-server x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Tue Sep 21 13:27:38 2010
ErrorMessage: subprocess installed post-removal script returned error exit status 2
PackageArchitecture: all
SourcePackage: dovecot
Title: package dovecot-postfix 1:1.2.9-1ubuntu6.1 failed to install/upgrade: subprocess installed post-removal script returned error exit status 2

[Thierry Carrez (ttx)]

Error is: /etc/init.d/postfix: 165: cannot open /etc/mailname/: No such file

This is not a bug, but a broken configuration. Marking as duplicate of first bug.