odoo/addons/project_mailgate/security/ir.model.access.csv

1	id	name	model_id:id	group_id:id	perm_read	perm_write	perm_create	perm_unlink
2	access_mail_message_project_user	project.mail.message.user	mail.model_mail_message	project.group_project_user	1	1	1	0