I tried to do it 2 different ways, but neither way worked.

@Component  
public class EmailForm{
...
private QuestionDAO questionDAO;
...
@Autowired
public void setQuestionDAO(QuestionDAO questionDAO) {
    this.questionDAO = questionDAO;
}
...

Another way:

@Component  
public class EmailForm implements ApplicationContextAware {
...
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    this.questionDAO = (QuestionDAO)applicationContext.getBean("questionDAO");
}
...

Neither way results in questionDAO being injected

Form bean is populated by spring:

@RequestMapping(method = RequestMethod.POST)
public String submit(@Valid final EmailForm emailForm, BindingResult result, final Model model) {