I am daily getting the following message from CRON-APT:
CRON-APT RUN [/etc/cron-apt/config]: Fri Jan 27 07:35:02 PST 2017
CRON-APT SLEEP: 3253, Fri Jan 27 08:29:15 PST 2017
CRON-APT ACTION: 0-update
CRON-APT LINE: /usr/bin/apt-get -o Acquire::http::Dl-Limit=25 update -o quiet=2
W: Failed to fetch http://packages.omv-extras.org…s/stoneburner/Release.gpg Something wicked happened resolving 'packages.omv-extras.org:http' (-5 - No address associated with hostname) [IP: 18.104.22.168 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.