When emails are saved or sent, they are available to be seen, edited or resent from the Email module and the Messages tab.
You can edit any single email message to send it, make changes or resend it if it has already been sent before.
If you create a new email from this screen, it is not connected to any other record or transaction. The only contacts you can select from for being recipients are Spire users, though you can manually enter any email address to specify another recipient.