A listing in DroneBL is NOT always related to spam. But in most cases because of an open proxy !!!
Details about 54.198.147.221
Country: United States of America (US)
Reverse: ec2-54-198-147-221.compute-1.amazonaws.com
Autonomous System Number: AS14618
Lookup results for 54.198.147.221
No specific incidents regarding 54.198.147.221 were found in DroneBL's incident tracking system. This means that your IP is not listed in DroneBL.