Free IP & Domain Blacklist Checker

A blacklist is a database of IPs and domains flagged for spam or poor sending behavior. Mailbox providers check these lists when deciding whether to deliver mail, so being listed sends your email to spam or blocks it.

Enter your sending IP or domain into the checker and run the scan. The tool checks it against major blacklists and shows which ones, if any, have you listed, so you know where to start delisting.

First fix what caused the listing, such as a volume spike, spam complaints, or hitting spam traps. Then submit a delisting request through the specific blacklist's removal process. Each list has its own steps.

Common causes are sudden volume spikes, high bounce rates, spam complaints, sending to unverified lists, or hitting spam traps. Clean your list and warm up properly, then request delisting once the behavior is corrected.

Yes. Enter your IP or domain, run the scan, and see your status. No account required.

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It varies by list. Some delist automatically after the bad behavior stops, often within days to weeks. Others require a manual request and can take longer. Fixing the underlying cause first is what makes removal stick.

Major lists like Spamhaus carry the most weight with mailbox providers, since many providers consult them directly. The checker scans the significant lists so you can prioritize the ones that actually affect delivery.

Yes. A single send to a stale or purchased list, a sudden volume spike, or hitting spam traps can trigger a listing. Warm up properly, verify your list, and send gradually to avoid it.

A domain listing can hurt all mail from that domain, and an IP listing affects everything sending from that IP, including shared IPs where other senders' behavior counts against you. Check both your domain and IP.