How do I allow email notifications when people submit

I have another question concerning posting a job on the plugin.
I have just posted a job but then I have some issues:

1. http://awesomescreenshot.com/03e3rrfi8a
2. When I use the [jbp-job-single-page] plugin, I notice that it asks for an id wont the ID automatically generate based on the job and more specifically what is it for?
3. Is it possible that when a job is published, the people who meet the certain criteria are then alerted by email about the job?