A listing in DroneBL is NOT always related to spam. But in most cases because of an open proxy !!!
Details about 187.115.35.175
Country: Brazil (BR)
Reverse: 187.115.35.175.static.host.gvt.net.br
Autonomous System Number: AS18881
Lookup results for 187.115.35.175
No specific incidents regarding 187.115.35.175 were found in DroneBL's incident tracking system. This means that your IP is not listed in DroneBL.