watchNS/xw.qmail.jp/a.ns.xw.qmail.jpについて、ここに記述してください。
1. unbound 1.5.7
[1449798089] unbound[1072:0] info: resolving a.ns.xw.qmail.jp. A IN [1449798089] unbound[1072:0] info: response for a.ns.xw.qmail.jp. A IN [1449798089] unbound[1072:0] info: reply from <qmail.jp.> 14.192.44.5#53 [1449798089] unbound[1072:0] info: query response was REFERRAL [1449798089] unbound[1072:0] info: resolving xw.qmail.jp. NS IN [1449798089] unbound[1072:0] info: resolving xw.qmail.jp. NS IN [1449798089] unbound[1072:0] info: response for xw.qmail.jp. NS IN [1449798089] unbound[1072:0] info: reply from <qmail.jp.> 14.192.44.5#53 [1449798089] unbound[1072:0] info: query response was nodata ANSWER [1449798089] unbound[1072:0] info: response for a.ns.xw.qmail.jp. A IN [1449798089] unbound[1072:0] info: reply from <xw.qmail.jp.> 14.192.44.29#53 [1449798089] unbound[1072:0] info: query response was NXDOMAIN ANSWER [1449798089] unbound[1072:0] info: response for xw.qmail.jp. NS IN [1449798089] unbound[1072:0] info: reply from <qmail.jp.> 14.192.44.5#53 [1449798089] unbound[1072:0] info: query response was nodata ANSWER [1449798089] unbound[1072:0] info: response for a.ns.xw.qmail.jp. A IN [1449798089] unbound[1072:0] info: reply from <xw.qmail.jp.> 14.192.44.29#53 [1449798089] unbound[1072:0] info: query response was NXDOMAIN ANSWER