A listing in DroneBL is NOT always related to spam. But in most cases because of an open proxy !!!

Details about 66.249.75.219

Country: United States of America (US)
Reverse: crawl-66-249-75-219.googlebot.com
Autonomous System Number: AS15169

Lookup results for 66.249.75.219

No specific incidents regarding 66.249.75.219 were found in DroneBL's incident tracking system. This means that your IP is not listed in DroneBL.