The mass mailing contact list now shows the unsubscription date only once and prevents users from editing it directly in the list view. This keeps opt-out information clearer and helps avoid accidental changes to an important compliance-related contact detail.

<b>Task:</b> https://www.odoo.com/web#id=11687&view_type=form&model=project.task&menu_id=3942&action=327
<b>Pad:</b> https://pad.odoo.com/p/r.hdAe69xkXpHS86KU