Network & IP
IP Blacklist Checker
Check whether an IP address or mail server is on major email blacklists (Spamhaus, SpamCop, Barracuda and more) — vital for email deliverability.
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The IP Blacklist Checker tests whether an IP address or mail server appears on major email blacklists such as Spamhaus, SpamCop and Barracuda, the same lists mail providers consult when deciding whether to accept or reject your messages. If your emails are landing in spam or bouncing entirely, a blacklisting is a common culprit, and this tool checks many reputation databases at once to pinpoint the problem.
Essential for email administrators, marketers, and businesses in Phnom Penh, Siem Reap and across Cambodia who rely on deliverable email, this free tool by Hosting Cambodia gives you a clear pass-or-listed result across dozens of blacklists. Enter your sending IP or mail server address to see exactly which lists flag it, so you can request delisting, fix the underlying issue, and restore your sender reputation quickly.
Frequently asked questions
Why is my mail server on a blacklist?
Common causes include a compromised account sending spam, a misconfigured mail server, poor sending practices, or sharing an IP with a previous abuser. The blacklist entry usually links to the specific reason.
How do I get removed from a blacklist?
First fix the underlying cause, such as securing accounts and correcting configuration, then submit a delisting request through the specific blacklist's website. Delisting only sticks if the problem is genuinely resolved.
Which blacklists does the tool check?
It checks major and widely used email blacklists including Spamhaus, SpamCop, and Barracuda, among others, so you get a broad view of your IP's reputation across the databases mail providers trust.
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