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dns

DNS CNAME Flattening Explained: How to Use Apex Domains with CDNs and Cloud Services

CNAME flattening lets you point your root domain (like example.com) to CDNs and cloud services by resolving CNAME records at the DNS provider level and returning standard A/AAAA records. This article explains how it works, why it matters, and how to avoid common pitfalls like email conflicts and SSL misconfigurations.

Aug 22, 2026 5 views

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dns

SPF, DKIM, and DMARC Explained: How to Set Up Email Authentication to Avoid Spam and Spoofing

Email authentication protocols SPF, DKIM, and DMARC work together to verify sender identity, protect your domain from spoofing, and keep your messages out of the spam folder. This guide explains how each protocol works, walks through a practical setup sequence, and highlights the most common mistakes so you can get your email infrastructure right the first time.

Aug 7, 2026 35 views

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dns

How to Use GeoDNS and Server Load Balancing to Improve Website Performance and Availability

GeoDNS and server load balancing are two complementary techniques that keep websites fast and online even under heavy traffic. GeoDNS sends visitors to the nearest available server based on their location, while load balancing spreads the workload across multiple machines to prevent any single server from becoming a bottleneck. This article explains how to combine both for maximum performance and reliability.

Aug 4, 2026 24 views

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security

MTA-STS and TLS-RPT: How to Enforce Secure Email Delivery with DNS Records

MTA-STS and TLS-RPT are two DNS-based email security standards that enforce encrypted delivery and provide failure reports. This guide explains how to set them up with practical steps, policy examples, and actionable tips to protect your domain from email interception.

Jul 10, 2026 45 views

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dns

How to Use DNS SRV Records for Service Discovery (SIP, XMPP, LDAP, and More)

DNS SRV records are powerful but often overlooked. They let you point specific services (like SIP, XMPP, or LDAP) to particular servers and ports, enabling failover and load balancing through priority and weight values. This article breaks down SRV record format, real-world use cases, setup tips, and how to verify your records using tools like Whose.Domains’ DNS Analyzer.

Jul 7, 2026 70 views