Hi,
Our site http://plazatiles.com is in your blacklist.
We have a new site in a new server, with new security measures.
¿Could you please remove our site from your blacklist?
Any detail regarding the causes of being blacklisted will be appreciated very much
Thanks,
Phishing detected :
https://www.virustotal.com/en/url/d8e4b54c2bc760806b3528a4d177d4d4166c5b8d6588ecd80deb1a52a8123a6b/analysis/1474278340/
Malicious and blacklisted :
https://sitecheck.sucuri.net/results/plazatiles.com
https://www.websicherheit.at/website-malware-viren-scanner/?url=plazatiles.com
Blacklistings and other problems on that ASN :
http://urlquery.net/report.php?id=1474278403246
Bad IP history :
https://www.virustotal.com/en/ip-address/91.134.230.212/information/
Still many things detected :
http://zulu.zscaler.com/submission/show/54979701cd3c49be29d94325c7776ed4-1474279511
Vulnerable library detected :
http://retire.insecurity.today/#!/scan/2e559d6b139038721ffbd35f2a79bb4f95e050218003020f951a1f904fd9775e
Other problem :
Site/server frequently not reachable.
Happy to hear you have started taking security seriously, I am removing ‘plazatiles[.]com’ from our blacklist 
Thanks a lot HonzaZ.
Also, thanks to Eddy for the information given.
Regards 
Don’t forget to take care of that vulnerable library.