I have Jenkins version 1.480.3 installed on my machine and Email-Extention Plugin 2.30.2.
Test mail from \"Manage Jenkins\" section works fine. When I add editable email
At first you have to create a template http://url-to-jenkins/emailexttemplates/.
In the field "Project Recipient List" you can add some emails (comma separated).
You can also insert global variables (Manage Jenkins > Configure System > Global properties) with:
${ENV, var="PATH"}
The "Advanced Settings..." option provides a trigger management, just add "Recipient List" and now you should get some emails by Jenkins.
Sometime after 2.66, if the From field is not set in the project, it doesn't seem to be falling back to the system email address. I believe this ticket is tracking the issue. https://issues.jenkins-ci.org/browse/JENKINS-63522