Enter an IP address or domain above and hit Check to scan the blacklists.
Check if your IP or domain is on a blacklist.
Enter a mail server IP or domain to check it against major DNS blacklists (DNSBLs) used by inbox providers worldwide. Being listed can send your email straight to spam.
If your mail server's IP address lands on a DNS blacklist (DNSBL), inbox providers may silently send your email to the spam folder or reject it outright. Blacklists exist to fight spam, but a legitimate business can end up listed through a compromised account, a shared IP, or a temporary reputation problem — and the damage to your email deliverability is immediate.
Our free blacklist checker tests your IP address or domain against the major DNSBLs that email providers rely on. Catching a listing early means you can fix the underlying cause and request delisting before it costs you customers.
Enter your mail server IP address or domain into the blacklist checker. It tests your IP against major DNS blacklists (DNSBLs) used by email providers. Being listed can cause your email to be marked as spam.
IPs are usually listed for sending spam, having a compromised account, or poor sender reputation. Once you fix the cause, you can request delisting from the blacklist that lists you.
Yes, the blacklist checker is completely free to use, provided by HostFaddy.
HostFaddy offers affordable web hosting, VPS and reseller hosting, domain registration and transfers as an accredited .co.za registrar, plus professional web and mobile app development — all backed by South African support.