docs: public void doRun(Properties properties) {
          ServerSetup[] serverSetup = new PropertiesBasedServerSetupBuilder().build(properties);
  
          if (serverSetup.length == 0) {
              printUsage(System.out);
  
          } else {
              greenMail = new GreenMail(serverSetup);
              log.info("Starting GreenMail standalone v{} using {}",
                      BuildInfo.INSTANCE.getProjectVersion(), Arrays.toString(serverSetup));
              greenMail.withConfiguration(new PropertiesBasedGreenMailConfigurationBuilder().build(properties))
                      .start();
          }
      }