public void enableSendLogging(boolean enable) {
   log.info("Logging of sent IMAP commands for user {} = {}", config.getUsername(), enable);
   if (enable) logAllMessagesForUsers.put(config.getUsername(), false);
   else logAllMessagesForUsers.remove(config.getUsername());
 }
 // For debugging, use with caution!
 public static void addUserForVerboseOutput(String username, boolean toStdOut) {
   logAllMessagesForUsers.put(username, toStdOut);
 }