Threats

DNSBL (DNS-based Blackhole List)

A blacklist queried via DNS. Mail servers check incoming connections against DNSBLs to identify known spam sources.

Why It Matters for Sender Reputation

A blacklist queried via DNS. Mail servers check incoming connections against DNSBLs to identify known spam sources. Understanding this concept is essential for maintaining good email deliverability and protecting your domain's sender reputation.

How It Works

Email security threats can damage your sender reputation and compromise your sending infrastructure. Understanding these threats helps you protect your domain and maintain deliverability.

Practical Example

When configuring your email sending infrastructure, paying attention to dnsbl (dns-based blackhole list) is critical. A misconfiguration or oversight in this area can lead to decreased deliverability, increased spam filtering, or even blacklisting.

Check your setup: Use our Sender Reputation Checker to verify your domain's configuration and get your free Sender Reputation Score.

← Back to Glossary