A listing in DroneBL is NOT always related to spam. But in most cases because of an open proxy !!!
Details about 107.21.35.124
Country: United States of America (US)
Reverse: ec2-107-21-35-124.compute-1.amazonaws.com
Autonomous System Number: AS14618
Lookup results for 107.21.35.124
No specific incidents regarding 107.21.35.124 were found in DroneBL's incident tracking system. This means that your IP is not listed in DroneBL.