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

1	id	name	model_id:id	group_id:id	perm_read	perm_write	perm_create	perm_unlink
2	access_mass_mailing_campaign	mail.mass_mailing.campaign.template	model_mail_mass_mailing_campaign		1	1	1	0
3	access_mass_mailing_campaign_system	mail.mass_mailing.campaign.system	model_mail_mass_mailing_campaign	base.group_system	1	1	1	1