+On shutdown, RT will clean up the temporary file created when using
+the 'testfile' option. If testing while the RT server is still running,
+you can find the files in the location noted in the log file. If you run
+a tool like C<rt-crontool> however, or if you look after stopping the server,
+the files will have been deleted when the process completed. If you need to
+keep the files for development or debugging, you can manually set
+C<< UNLINK => 0 >> where the testfile config is processed in
+F<lib/RT/Interface/Email.pm>.
+