A listing in DroneBL is NOT always related to spam. But in most cases because of an open proxy !!!
Details about 3.133.152.26
Country: United States of America (US)
Reverse: ec2-3-133-152-26.us-east-2.compute.amazonaws.com
Autonomous System Number: AS16509
Lookup results for 3.133.152.26
No specific incidents regarding 3.133.152.26 were found in DroneBL's incident tracking system. This means that your IP is not listed in DroneBL.