What is a DNSBL blacklist?

A DNSBL (Domain Name System Blacklist) is a real-time database that lists IP addresses or domains associated with spamming, malware propagation, or other malicious behaviors, used by mail servers to filter traffic.

Why is my IP address blacklisted?

IP addresses are blacklisted if they are detected sending bulk spam emails, hosting malicious content, acting as an open mail proxy, or if they belong to a dynamic IP range assigned to residential connections.

How can I request IP delisting?

To delist an IP, you must first identify which specific database (such as Spamhaus or Barracuda) has blacklisted your IP, resolve the underlying security issue on your server, and then submit a removal request on the blacklist operator's website.

O que é o repositório de ameaças de segurança USOM?

O USOM é o Centro Nacional de Resposta a Incidentes Cibernéticos que monitora feeds de ameaças em tempo real.

Listas negras

Verifique qualquer endereço IP ou nome de host nas bases de dados de reputação globais DNSBL (lista negra de DNS).

Exemplos:

Auditoria de Lista Negra DNSBL

Audite endereços IP em listas negras globais em tempo real para proteger a reputação do remetente.

Inteligência de Ameaças Nacional USOM

Sincronização direta com repositórios nacionais de ameaças identificando nós maliciosos.

Proteção da Entregabilidade de E-mail

Inspecione nós MX de saída para evitar rejeições de entrega e classificação automática de spam.

Reputação de Rede do Sistema Autônomo

Avalie a confiabilidade de prefixos BGP, dados de ASN e histórico de ameaças de sub-redes.

Mecanismo de Verificação Lista Negra IP DNSBL

A DNSBL IP Blacklist Checker allows you to query multiple Domain Name System Blacklists (DNSBL) and Real-time Blackhole Lists (RBL) to verify if a specific IP address or hostname is flagged for sending spam, hosting malware, or engaging in malicious activity. These list databases are compiled globally to block harmful traffic, improve server security, and prevent spam emails from reaching inbox folders.

If a server's IP address gets listed on a DNSBL, mail servers worldwide may reject outgoing emails, and web browsers or security firewalls might block user access. Getting blacklisted typically happens due to compromised security credentials, open mail relays, infected devices on the network, or spam activities. Regularly auditing your server's IP reputation helps maintain email deliverability and avoid security warnings.

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