A listing in DroneBL is NOT always related to spam. But in most cases because of an open proxy !!!
Details about 64.15.205.101
Country: United States of America (US)
Reverse: none
Autonomous System Number: AS3561
Lookup results for 64.15.205.101
No specific incidents regarding 64.15.205.101 were found in DroneBL's incident tracking system. This means that your IP is not listed in DroneBL.