DNSBL Spam Check

Checked IP: 52.55.231.237
rDNS/PTR record: guardpost-n11.use1.mailgun.co

Listed: 2 findings
Finding Response time
Blacklisted: usenix.org
Try to delist your IP from all.s5h.net
Follow the instrucion on this website.
101.3222 ms
Blacklisted: SpamRATS! all
Try to delist your IP from all.spamrats.com
3,447.3321 ms
Not Listed: 24 checks
Check Response time
Found rDNS/PTR: guardpost-n11.use1.mailgun.co
31.6300 ms
Inactive: 2
Inactive
Response in: 5.0241249 seconds
Amount of searched blacklists: 26 (2 inactive)