doryn177 Said:
"Mail is not working on my iPhone: My email is not working, my iCloud is not receiving or sending messages, and I have important messages from my attorney that I need to open. but I have not yet received"
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Troubleshooting iPhone Mail:
Create and Use an App Password:
Note that you would need a new App Password, being that Mail is a third party app. You cannot log in using your eMail address password. As an example, go here for Hotmail: Manage app passwords for two-step verification - Microsoft Help