Blacklist Check

A blacklist check is a process that verifies if an email address, IP address, or domain is listed on one or more known blacklists. These blacklists are used by email providers to identify and filter out sources of spam or malicious activity.

Our blacklist checker queries multiple DNSBLs (Domain Name System Blacklists) and other spam block lists in real-time. You enter an email, domain, or IP, and our tool checks its status across these lists, reporting back if it’s found on any of them.

Monitoring your domain for blacklists is crucial for maintaining your email deliverability and sender reputation. If your domain is blacklisted, your emails may be blocked or sent to spam, preventing them from reaching your audience. Regular monitoring helps you detect and address issues proactively.

If you find your domain or IP on a blacklist, the first step is to identify which blacklist(s) you are on and the reason for the listing. Then, address the underlying issue (e.g., secure your server, remove malware, stop spammy practices). Once resolved, follow the specific delisting procedure provided by each blacklist operator.

While “blocklist” or “denylist” are accurate terms, “blacklist” remains widely recognized in the context of email deliverability and spam filtering. Our tool uses common industry terminology for clarity, though we acknowledge and respect the evolving language preferences in the tech community.

DNSBL stands for Domain Name System Blacklist (or Blocklist). It’s a service that uses the Domain Name System to publish lists of IP addresses that are known or suspected sources of spam. Email servers can query DNSBLs to help decide whether to accept, reject, or filter an incoming email.

Yes, completely free. You don’t need to sign up or create an account. Just enter your domain, IP, or email, and we’ll check it against major blacklists. We use this tool inside Mailmeteor and thought you could like it too.

If you’re sending emails regularly, it’s a good idea to check at least once a week or whenever you notice a drop in open or delivery rates. Frequent checks can help you catch issues early.

We check your domain or IP against a selection of the most commonly used DNS-based blacklists (DNSBLs), such as Spamhaus, Barracuda, SORBS, and others. These are widely used by mail servers to filter out spam.

Not necessarily. Sometimes domains or IPs get listed due to misconfigurations, shared IP issues (like on shared hosting), or if your email server was compromised. It’s important to investigate the reason behind the listing.

We don’t handle removals directly. However, our tool tells you which blacklist you’re on, and most blacklists provide a removal or delisting process you can follow. We include links to help you get started.

Not at all. Running a check is a read-only process and doesn’t interact with your domain or server in any way. It’s completely safe and private.

Absolutely. You can check any domain or IP you have permission to monitor—whether it’s your own or a client’s. It’s especially useful for agencies managing multiple senders.