Users can now type @ in a mail message to search for and insert contacts directly into the conversation. This makes it easier to involve the right people while composing messages and improves collaboration in Odoo's mail features.

TASK: https://www.odoo.com/web#id=9441&view_type=form&model=project.task&action=333&active_id=131
PAD: https://pad.odoo.com/p/r.opejjuEXLrHJdSi7