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

1	id	name	model_id:id	group_id:id	perm_read	perm_write	perm_create	perm_unlink
2	mail_gateway_mailgate_message	mail_gateway.mailgate.message	model_mailgate_message	base.group_system	1	1	1	1
3	mail_gateway_mailgate_thread	mail_gateway.mailgate.thread	model_mailgate_thread	base.group_system	1	1	1	1