I am using 2.1RC3 and I am highly suspicious that the example form does not work. (It does not work either on the online demo from the Magnolia site)

• the action attribute should be :
  ${pageContext.request.contextPath}${actpage.handle}.html
  while at the moment it is:
  ${actpage.handle}.html
  which leads to an unknow page ... (or
• there is also a ClassCastException, the following code:
  ===========
  Iterator it=Resource.getActivePage(request).getContentNode("mainColumnParagraphs").getChildren().iterator();
  while (it.hasNext()) {
  ContentNode node=(ContentNode) it.next();
  ===========
  is casting objects retrieved form the iterator to (ContentNode) while the expected is actually 'info.magnolia.cms.core.Content' ...

Also, I would be for moving the class MailHandler to a proper class in the Magnolia code, and have it log the exception when mailing failed along with successfully logging sent emails ...