Mail inbox greyed out
I have iphone 5S running IOS 12.4.6. Recently, I have been unable to access my mail inbox as it is greyed out. If I add a new email IMAP account, new messages appear in the "All accounts" inbox and all inbox messages remain available - including those from the account that would not display. These are the steps I have taken:
Delete the problem account from the iphone.
Delete the Mail app.
Do the same on my IPAD
Also delete the problem account from my laptop (running Outlook 365)
Thus, in effect, the only place my account is running is on the IMAP server.
Backup phone and do a factory reset
Restore the system from Itunes (having checked it is the latest version)
Restore the backup
Add the problem account again
Open the app
Inbox shows 8 messages but is still greyed out and not accessible
iPhone 5s