Know and track (un)subscription reasons, GDPR compliant
Use the QWeb templating mechanism for emails
Copy tracking fields from leads to partners
Enforces 1 registration per partner and event
Avoids duplicate mailing lists and contacts
Disable mass mailing to partners by default (opt-out)
Show additional social icons in Mass Mailing snippet
Find duplicate emails and delete in the mailing list
Mass Mail Christmas Email Template + supported in Odoo v10, v11, v12