Don't know why you are downvoted. Many corporations and institutions employ sandboxes to check mails and the links contained in them. This is a standard securit

Don't know why you are downvoted. Many corporations and institutions employ sandboxes to check mails and the links contained in them. This is a standard security practice by now. So a link that is only valid once would be affected. Restricting the validity by time is a good way to solve this while still maintaining decent security.