joomla/joomla-cms — pull request #2462 by demis-palma (2013-11-09 19:34:56+00:00)
Title: Email subsystem blocked after upgrade to Joomla 3.2

The mailonline option introduced in Joomla 3.2 lets websites with email subsystem completely blocked. Even worse, sites owners don't ever know to have a problem.
Since the upgrade procedure doesn't set mailonline, when the mailer reads this value, it should default to "enabled".