How do I change my flow email?
To change your email address, click 'Edit' beside the primary email address field. Add your new email address and click 'Verify'. This will send you an email verification. Once verified that email address will become the email address you login with and will show as your primary email address.
How do I notify everyone of a change of email address?
Then you need to tell everyone about the change. Using your new address, send an email to everyone in your address book—friends, relatives, and business associates. Address the message to yourself (again, with the new address), and BCC everyone else. The BCC part is important.