Delivery Status Notification (Failure)

Delivery to the following recipient failed permanently:

root@server-asasha.net

Technical details of permanent failure:
DNS Error: Address resolution of server-asasha.net. failed: Domain name not found

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Wed, 30 Dec 2015 21:56:23 -0800 (PST)
From: Cron Daemon <4sumy4@gmail.com>
X-Google-Original-From: root@server-asasha.net (Cron Daemon)
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for root@server-asasha.net; Thu, 31 Dec 2015 07:54:01 +0200
To: root@server-asasha.net
Subject: Cron <root@debian-7-5> ntpdate 0.ua.pool.ntp.org
Content-Type: text/plain; charset=UTF-8
X-Cron-Env: <SHELL=/bin/sh>
X-Cron-Env: <HOME=/root>
X-Cron-Env: <PATH=/usr/bin:/bin>
X-Cron-Env: <LOGNAME=root>
Message-Id: <E1aEWBV-0002zR-VQ@debian-7-5>
Date: Thu, 31 Dec 2015 07:54:01 +0200

/bin/sh: 1: ntpdate: not found