currently I try to upgrade from a (very) earlier release to the 3.1.2 release of Zimbra Open Source Edition. The upgrade wizard ran fine till it tries to stop the services. My logfile says
Jun  2 16:32:20 hermodr postfix[8971]: fatal: chdir(/usr/libexec/postfix): No such file or directory
The existing installation and the upgrade wizard has not created this directory, therefore it does not exist.
Have I missed something, or is my installation of Zimbra too old for upgrading?
I'm using Debian 3.1 stable, the version installed before was zcs-3.0.1_GA_160.

Greetings, Kastor