What causes a domain or IP to get blacklisted?

Common reasons include compromised email accounts sending bulk spam, malware or phishing scripts uploaded to insecure CMS portals, open mail relays, missing SPF/DKIM/DMARC records, or sharing an IP address with malicious web actors.

How do I delist my IP or domain from DNSBL blocklists?

First, locate and eliminate the source of abuse (patch vulnerabilities, reset compromised credentials, configure reverse DNS PTR and DMARC). Then visit the official removal link for that specific DNSBL and submit an automated delisting request.

Does an IP blacklist affect web portal availability?

While DNSBLs primarily protect email servers from receiving spam, listings on databases like Spamhaus DBL or SURBL cause modern enterprise firewalls, antivirus suites, and government web proxies to block browser traffic to the website.

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What is a DNSBL?

A DNS-based Blackhole List (DNSBL) is a real-time database queried over DNS to identify IP addresses and domain names that originate spam, malware, or botnet command-and-control operations.

Impact on Email Deliverability

When your IP is blacklisted, mail receivers (NIC Mail, Gmail, Outlook, Yahoo) reject or redirect your government notifications and transactional emails directly to citizen spam folders.

Preventing Future Listings

Configure SPF, DKIM, and DMARC with strict rejection (`p=reject`), ensure reverse DNS PTR matches your HELO hostname, and isolate citizen contact forms with reCAPTCHA.