You mean i twill be sent as an SMS.iMessages are not converted to SMS Messages is the app. It send iMessages or SMS/MMS. You cannot get iMessages as SMS.The sender will send either iMessage or SMS. If the receiver has iMessages set to Off, then the sender can only send SMS (except for this issue this article is talking about).If they are "Saved" then you have not deleted them on the iPhone. Delete them, backup and restore your iPhone to recover that space.