Blacklist checks query DNS-based blocklists (DNSBLs) by reversing the IP and checking against known zones. Listings can affect email delivery and reputation.
An IP blacklist is a list of IP addresses associated with spam or abusive activity. Email providers and security tools use them to block or flag traffic.
Why is my IP blacklisted?
Common causes include compromised devices, spam from a shared IP, or poor reputation from a hosting provider or ISP.
How do I get delisted?
Identify the list, fix the root cause, then request delisting from the blacklist provider or via your ISP/hosting provider.
Do blacklists affect websites or only email?
Most blacklists are used for email, but some security systems use them for web traffic and abuse prevention too.
