spfData.pushChecker(resultHandler);
spfData.pushChecker(this);
spfData.pushExceptionCatcher(new SPFCheckerExceptionCatcherImplementation(resultHandler, log));
FutureSPFResult ret = new FutureSPFResult();
executor.execute(spfData, ret);
// if we call ret.getResult it waits the result ;-)
// log.info("[ipAddress=" + ipAddress + "] [mailFrom=" + mailFrom