If you are using a Microsoft run email domain such as live.com, outlook.com or hotmail.com to receive email from openstreetmap.org please be aware that Microsoft are currently blocking all email deliveries from our mail server - see https://github.com/openstreetmap/operations/issues/1247 for updates
UPDATE: Fixed. If you are missing a sign-up confirmation email or password reset email use https://www.openstreetmap.org/user/forgot-password to send another.