A listing in DroneBL is NOT always related to spam. But in most cases because of an open proxy !!!
Details about 35.153.166.111
Country: United States of America (US)
Reverse: ec2-35-153-166-111.compute-1.amazonaws.com
Autonomous System Number: AS14618
Lookup results for 35.153.166.111
No specific incidents regarding 35.153.166.111 were found in DroneBL's incident tracking system. This means that your IP is not listed in DroneBL.