Blog
Practical guides and data reports on DNS, domains, hosting, SSL, website technology and email security.
Why Secondary DNS Providers Are Critical for High Availability
Discover how secondary dns high availability protects your domain from outages. Learn setup steps, zone transfers, and best practices today.
How to Identify Tracking Codes and Pixels on a Website
Learn how to perform an analytics ID lookup to find hidden tracking codes, Google tags, and marketing pixels on any website quickly and accurately.
How to Check TXT Record Propagation for Google Workspace Setup
Learn how to perform a txt lookup to verify Google Workspace DNS propagation. Step-by-step guide with commands, exact syntax, and troubleshooting tips.
How to Set Up Custom Domain DNS for Thinkific Course Sites
Learn how to configure your Thinkific custom domain DNS setup correctly. Step-by-step instructions for A records, CNAME, and troubleshooting.
How to Troubleshoot 'ERR_NAME_RESOLUTION_FAILED' in Enterprise Networks
Learn how to troubleshoot and fix err name resolution failed enterprise network errors quickly with expert DNS commands, syntax fixes, and step-by-step guides.
Linode DNS Manager: Step-by-Step Mail Exchanger Setup
Learn how to configure linode dns mx records step-by-step. Set up your mail exchanger correctly, verify delivery, and avoid common DNS mistakes.
How to Troubleshoot Email Delivery Issues Using MX Lookup
Learn how to troubleshoot email delivery DNS issues with expert steps, exact record syntax, CLI commands, and MX record analysis.
What Is a Backup Mail Exchanger and Do You Still Need One?
Learn what a backup MX record and secondary mail server do, how they work, how to set them up, and whether your business still needs one today.
Sysadmin Toolkit: Diagnosing Corporate Email Outages via DNS
Master sysadmin email troubleshooting DNS MX records to diagnose and fix corporate email outages quickly. Step-by-step commands and expert guide.
How to Verify IPv4 and IPv6 Dual-Stack Implementation Using DNS Lookups
Learn how to verify dual stack IPv4 and IPv6 DNS implementation correctly. Follow our step-by-step guide using CLI tools and diagnostics.
How to Find the Mail Server IP for Any Domain
Learn how to perform an MX lookup to find mail server IP addresses for any domain. Step-by-step guide with command-line tools and record syntax.
How to Fix SSL Certificate Chain Errors on Apache and Nginx
Learn how to fix SSL certificate chain errors on Apache and Nginx. Follow our expert troubleshooting steps, verify via our SSL Checker tool, and secure your site.