Sending an Email to All Event Attendees
Keep your event attendees in the loop by emailing them directly from the event page.
Go to Calendar
From the left-hand menu, click Calendar.Open the event
Click the event you'd like to email attendees about.Click Email
In the event's sidebar (next to the event photo and name), click Email. The composer opens with the header Send Emails, and all attendees are added to the To field.Write your message
Add a Subject.
Type your message using the rich text editor.
Update the Reply to address if needed.
Send or schedule
Click Send to deliver immediately, or use the Send dropdown to Schedule for later.