I am using KMail 1.12.1 and KDE 4.3.2 on Linux 2.6. Does anybody out there know where to find the configuration files for it? The intention behind that is to share these files on more than one computer using a version control system, e.g. subversion.
You are looking for the kmailrc file. Just do a locate or find from a terminal window.
You might also want to have a look at the KMail Handbook.