Was a spammer times ago: http://www.projecthoneypot.org/ip_81.169.145.160
IP badness history: https://www.virustotal.com/nl/ip-address/81.169.145.160/information/
Scam and malware: https://www.mywot.com/en/scorecard/wa0.rzone.de
Never actually been there in the browser, just saw that hostname for a sec in the network monitoring tool.
Webstatus of website is invalid: http://whois.domaintools.com/rzone.de
http://sitecheck.sucuri.net/results/81.169.145.160
See: Unable to properly scan your site. Site returning error (40x): HTTP/1.1 404 Not Found
ERR_SSL_UNRECOGNIZED_NAME_ALERT = IP not blacklisted.
http://www.netip.de/dns?domain=wa0.rzone.de
Warnings: http://www.dnsinspect.com/rzone.de/1425316517
Does it have XLink.Looker Trojan?
polonus