Emailing yourself a to-do
To-do by email, in the menu under your initials at the top right.
The address alone decides whose list it goes on and which organisation it belongs to, whoever the email says it is from. So keep it private. Copy puts it on your clipboard to save as a contact. New address makes a fresh one and the old one stops working at once; Turn off stops it without a replacement. Mail sent to an address that has been turned off or replaced is thrown away, never filed.
The page shows your address at the organisation you are signed into, and below it any you have at your other organisations, each of which can be turned off from here. Each of your other organisations is listed too, with Make one where you have no address there yet. An organisation that has not set up its inbound email domain cannot give out addresses yet; a Director sets that in Settings.