addons/portal_anonymous/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_portal,mail.message.portal,mail.model_mail_message,portal.group_anonymous,1,0,0,0
   3 access_res_partner,res.partner,base.model_res_partner,portal.group_anonymous,1,0,0,0