No Sender No Subject emails
My wife's iPad in the Apple Mail program is continuously getting "No Sender, No Subject" emails dated 12/31/69. Is there a way to make this stop? It's not a new one, "About" says it's Version is 11.4.1(15G77) Model MD785LL/A.
Thanks for your help.
iPad 2 Wi-Fi, iOS 11.4.1