Email is perhaps the original federated communication system. Its been done a lot of ways. We connect with email through the Report plugin. It has a server side that assumes batch email has been properly configured.
We're reading the blogs and tapping our friends to see if we can work this out.
How to Enable Local SMTP (Postfix) on OS-X Leopard. website 
What's the correct way to make Postfix run permanently on Lion (not server) website
Enable the postfix Mail Transfer Agent website
Prepare Your Pi To Send Mail Through Gmail website (this works)