config.setEncoding("UTF-8");
config.setHostname("localhost");
config.setLoggerName("MailService");
config.setLoggerPrefix("MailService");
config.setPostmasterEmail(null);
FileMailStore fms = new FileMailStore();
fms.setRootDir(new File("D:\\temp"));
fms.setSubDirCount(10);
config.setMailStore(fms);
MBeanServer mbS = ManagementFactory.getPlatformMBeanServer();
mbS.registerMBean(config, new ObjectName("org.masukomi.aspirin:type=Configuration"));