Ok, so is TLS Heartbeat accessible in every service that uses TLS? The big one that comes to mind aside from https is smtp/tls, e.g. port 587 Edit: Apparently

Ok, so is TLS Heartbeat accessible in every service that uses TLS? The big one that comes to mind aside from https is smtp/tls, e.g. port 587 Edit: Apparently a PoC on STARTTLS has already been written, so smtp/tls is definitely vulnerable