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
Adds active feature on mailing list contact and subscriptions
Allow registration grouped by quantities
Allows sell registrations with more than one attendee
Automatically subscribe partners to its company's business documents
Link mass mailing with event for excluding recipients
Enforces 1 registration per partner and event
Avoids duplicate mailing lists and contacts