A listing in DroneBL is NOT always related to spam. But in most cases because of an open proxy !!!

Details about 170.0.52.146

Country: Brazil (BR)
Reverse: none
Autonomous System Number: AS264974

Lookup results for 170.0.52.146

No specific incidents regarding 170.0.52.146 were found in DroneBL's incident tracking system. This means that your IP is not listed in DroneBL.