DMA, the DragonFly Mail Agent, has been updated so that it can deliver email from cron job output.  DMA is a former Summer of Code project to make a local-only mailer for DragonFly systems, so that larger mail transfer agents (like Sendmail or Postfix) are not needed on a system that isn’t designed to receive mail from external sources.  There’s a TODO list (click the gitweb link) if you’d like to contribute.