When creating a job posting, one of the first things you'll be asked is how you'd like to receive your applicants. You'll have three options here:
1) Through the Magnet system
2) Through an ATS system (or any link to your website)
3) Through your email
Just select the option that works best for you, and fill out the extra options. For example, if you select email, just check off any attachments you want applicants to submit and off you go!
Note that selecting email will also default to your organization's email address. You can change this by clicking on "Add follower Email Address" and removing yourself from the list. You can then add a follower or followers, who will be receiving the applications in their inbox.