Robert: Please try again when you have time. The server hosting ask.openstack.org was rebuilt a little over 2 weeks ago (on May 20), and it wasn't noticed at the time that the IP address assigned for it was covered by a Spamhaus Policy Block List entry maintained by the service provider. An exception has been added to the PBL for this address now, and any providers checking against it should hopefully cease to see it listed as disallowed (very soon at least, if not already).
Robert: Please try again when you have time. The server hosting ask.openstack.org was rebuilt a little over 2 weeks ago (on May 20), and it wasn't noticed at the time that the IP address assigned for it was covered by a Spamhaus Policy Block List entry maintained by the service provider. An exception has been added to the PBL for this address now, and any providers checking against it should hopefully cease to see it listed as disallowed (very soon at least, if not already).