Email address availability logic doesn’t handle ‘.’ correctly When changing email address the UI accepts email addresses starting and ending with a ‘.’ or with consecutive ‘.’.
Non-Delivery Report – The email address you entered couldn’t be found When attempting to send an email to an existing address stored in your email auto-complete selection list, or a new email address typed in manually, a non-delivery report is received stating that 'The email address you entered couldn't be found.
What to do if your name changes How to edit your name and update your email address if your name changes.