Email header. The email header is a code snippet in an HTML email, that contains information about the sender, recipient, email's route to get to the inbox and various authentication details
Services can be restricted due to different factors. If when an individual have received calls on their cell phone and the device's caller ID shows "Unavailable" or "Restricted," It can be due to a lot of factors.
Note that caller ID designations are brought about by the settings on the caller's end or network restrictions and not the phone's settings.
When a Cell phone calls designated shows "Unavailable" on a phone's caller ID, it means that the placed from an area or region is, is where the wireless service provider or phone company cannot be able to retrieve that phone number.
A "Restricted" phone call is said to be a call from a caller who has blocked one's phone so that you cannot identify their number.
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