foo.setDuplicateHostName("foo.com");
        duplicateHostHelper.duplicateHostList.add(foo);
        DuplicateHost bar = new DuplicateHost();
        bar.setRegularName("www.bar.com");
        bar.setDuplicateHostName("mail.bar.com");
        duplicateHostHelper.duplicateHostList.add(bar);
        DuplicateHost hoge = new DuplicateHost();
        hoge.setRegularName("www.foo.com");
        hoge.setDuplicateHostName("www.foo.com:99");