1. In the event dashboard on the left sidebar, click on "People".
2. Then click on import.
3. Here. You can download list of people who are already registered in the event.
4. Re import the same list and select "Send Registration Confirmation Mailer for Newly Added Attendees"
5. Proceed by clicking "Next".
6. Once all the fields are mapped and you have reviewed the summary. Click on "Next", this will send out the confirmation mailer to new and existing attendees.
