By way of follow-up, we now observe that reverse IPV6 resolution is back online for the IETF. Thank you for your patience with this outage, and noisy announcement. Glen Glen Barney IT Director AMS (IETF Secretariat) On Tue, Jul 5, 2016 at 10:49 AM, Glen <glen@amsl.com> wrote: > All - > > I have just discovered that IPV6 reverse resolution for the IETF is > offline. It appears to have been offline for the past 30 minutes or > so. > > IPV6 reverse resolution is provided by Level3 - the provider at which > IETF services are hosted. > > An emergency ticket has been opened with Level3, and has been > acknowledged. They are working on the problem now. > > We have been assured by Level 3 that this issue has been escalated to > their top engineers; however, no ETA is available yet. > > In the meantime, the absence of reverse DNS for IPV6 may cause some > user mail servers to reject IETF mail, or to incorrectly score it as > Spam. Google, for example, is currently putting all IETF mail into > users' spam folders, with a warning about mail configuration. > > As a result, I have instructed all of our mail servers to attempt > delivery over IPV4 first, before attempting IPV6 delivery, in an > effort to mitigate this problem. > > We apologize for the inconvenience, and will send an update as soon as > we hear back from Level3. > > Glen > Glen Barney > IT Director > AMS (IETF Secretariat)
