Use the QWeb templating mechanism for emails
Know and track (un)subscription reasons, GDPR compliant
Force a mail layout on selected email templates
Mass mailing lists that get autopopulated
Mail settings in events
Link partners with their survey results
Sell events from Point of Sale
Allow selling event registrations before the event exists
Copy tracking fields from leads to partners
Combine event reservations, opportunities and quotations
Compose and send mails to event attendees
Restrict event track location overlapping