A listing in DroneBL is NOT always related to spam. But in most cases because of an open proxy !!!
Details about 5.220.251.3
Country: unknown
Reverse: none
Autonomous System Number: none/unknown
Lookup results for 5.220.251.3
No specific incidents regarding 5.220.251.3 were found in DroneBL's incident tracking system. This means that your IP is not listed in DroneBL.