DNSBL Spam Check

Checked IP: 188.172.123.158
rDNS/PTR record: mail.humboldt-schule.de

Not Listed: 26 checks
Check Response time
Found rDNS/PTR: mail.humboldt-schule.de
18.5521 ms
Inactive: 2
Inactive
Response in: 8.765774 seconds
Amount of searched blacklists: 26 (2 inactive)