Blocklist Lookup
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DNSBL Server Results
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Check your IP or domain against dozens of the world's most authoritative DNS-based blackhole lists (DNSBL).
Ensure your mail server IP is not listed on anti-spam lists, which could cause your outgoing emails to bounce or land in junk folders.
Regularly monitor your server's reputation to detect compromised accounts, malware distribution, or unauthorized relaying quickly.
FAQS
What is a DNSBL?
A Domain Name System Blackhole List (DNSBL) is a database of IP addresses or domains known to send spam, host malware, or participate in botnets.
Why is my IP listed?
Your IP might be listed if a user on your network sent spam, your server was compromised, or you inherited an IP with a poor previous reputation.
How do I get delisted?
If you are listed, you must visit the specific blocklist provider's website (e.g., Spamhaus), follow their remediation guidelines, and submit a delisting request.
Will being listed affect my website?
Being on a DNSBL primarily affects email deliverability. However, some security firewalls and web filters may block access to blacklisted websites as well.