A listing in DroneBL is NOT always related to spam. But in most cases because of an open proxy !!!
Details about 100.28.132.120
Country: United States of America (US)
Reverse: ec2-100-28-132-120.compute-1.amazonaws.com
Autonomous System Number: AS14618
Lookup results for 100.28.132.120
No specific incidents regarding 100.28.132.120 were found in DroneBL's incident tracking system. This means that your IP is not listed in DroneBL.