social/mail_private/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_group_all	mail.security.group.all	model_mail_security_group		1	0	0	0
3	manage_mail_message_group_all	mail.security.group.manage	model_mail_security_group	base.group_system	1	1	1	1