A listing in DroneBL is NOT always related to spam. But in most cases because of an open proxy !!!
Details about 81.37.208.44
Country: Spain (ES)
Reverse: 44.red-81-37-208.dynamicip.rima-tde.net
Autonomous System Number: AS3352
Lookup results for 81.37.208.44
No specific incidents regarding 81.37.208.44 were found in DroneBL's incident tracking system. This means that your IP is not listed in DroneBL.