I would like to start over with zimbra installation on FC4 without "reformatting and starting from scratch". Is this possible? I tried to deinstall all RPMs using "rpm -e `rpm -qa | grep zimbra`", delete the "zimbra" user and remove its home directory (/opt/zimbra), but obviously this is not enough. When I try to reinstall, the command "su - zimbra" gives me the error message "could not open session". Odd enough, when I rename the user name "zimbra" to something else using vipw, the su command works again. Cleaning up with visudo does not help either.
Is there a way to remove a zimbra installation and start over without reinstalling everything (including linux) from scratch?