1. Open your event's dashboard and click on "Promotions".
2. Then click on "Mailers".
3. Open the actions menu for the Reminder Mailer.
4. You can click on the 3 dots and select "Manage" to update the content of the mailer and make the changes according to your preference.
5. Click on the "Name, audience and CC" option to update the details of the mailer like Name, send to fields, and CC & BCC.
6. Here you can fill out the details and click on the "Save" button.
7. In the “Send to” field, select “Specific groups”, and then, in the “Specific Groups”’ field, chooses one or more groups, then click save.
8. If you scope the registration confirmation mailer to a set of groups, the registration confirmation will only be sent to attendees who belong to any of the selected groups.