I have the same issue with my iPhone 4S and iPad 4 running iOS 7 I tried to send email to several contacts bcc-ed and "to" is empty it failed to send , I tried it several times then my account got stuck and couldn't sync with outlook server.

Apple iOS 9.3 Glitch Is Causing Older iPad Activation Problems Mar 24, 2016 My iPhone Is Verified, but Cannot Connect to the Server Aug 22, 2013 Version 4.10.0 not working on ipad |VMware Communities Mar 21, 2019

Apple iPad - Reset Cellular Data Account | Verizon

Mar 20, 2016 Why My iPad Won't Connect to Wi-Fi? Here Is The Fix Restart Your Router and Make Sure You Are Within Range. Before you start thinking that the problem …

When Google Earth says it can't connect to the server, that doesn't mean there's a problem with your internet. It means that the program can't reach the Google server it needs to perform your search. There aren't any settings in Google Earth to affect the program's ability to connect to the Google servers.

Error Connecting Apple ID, Verification Failed. How-To Fix Mar 08, 2020 iPad has WiFi connection, but cannot connect to the Mar 20, 2016 Why My iPad Won't Connect to Wi-Fi? Here Is The Fix