DNSBL Spam Check

Checked IP: 51.81.137.233
rDNS/PTR record: mta19.windifferent.com

Not Listed: 26 checks
Check Response time
Found rDNS/PTR: mta19.windifferent.com
121.7821 ms
Inactive: 2
Inactive
Response in: 3.1903391 seconds
Amount of searched blacklists: 26 (2 inactive)