DNS
SPF Include Chains: Staying Under the 10-Lookup Limit Without Flatteners
Keep email authentication reliable—master 5 strategies to prevent SPF PermErrors and stay under the 10-lookup limit—avoid the risks of flattening services.
All articles
KEEP YOUR IDEAS GROWING
NameSilo Staff
A little insight goes a long way. Find your next good read.
1,711 articles
Sort by
DNS
dig for Beginners: Five Commands Every Domain Owner Should Know
Use the 5 essential `dig` commands to troubleshoot DNS—check IP, verify email configuration, track propagation, identify nameservers, and review TXT records. Stop guessing.
Email
Email Forwarding Limits: When Aliases Are Enough and When to Buy Mailboxes
Stop relying on free email forwarding—learn the technical issues (SPF, DKIM, DMARC) that break reliability. Discover when aliases are sufficient vs. when you need a paid mailbox.
DNS
Default TTLs at Registrars: What They Are and When to Override
Control DNS caching with Time To Live (TTL) values. Learn the standard 3600s default—and when to optimize by using shorter or longer TTLs for specific needs.
DNS
Safe Record Deletion: Retiring Old DNS Entries Without Outages
A methodical guide to safely retiring obsolete DNS records without causing outages—reduce security risks, management complexity, and costs.
DNS
TXT Quoting & Escaping: The Most Common Cause of Broken Verifications
Troubleshoot DNS TXT record failures—learn about the complex formatting rules for quoting, escaping, and the 255-character limit—ensure reliable SPF, DKIM, and DMARC records.
DNS
SRV Records Made Simple: SIP, XMPP, and Game Servers
Learn how SRV records simplify service discovery for VoIP, XMPP, and game servers—explaining their structure, priority, weight, and common configuration mistakes.
DNS
MX Priority in Real Life: How Mail Chooses a Server When Things Break
Discover how mail servers use MX priority for failover, why backup MX can be complex, and the critical misconfigurations to avoid—ensuring reliable email delivery.
DNS
Nameserver Change vs Record Change: Which Fixes Your Issue Faster?
Should you update DNS records or change nameservers? Learn the key differences—speed, control, and email risk—to make the right choice and avoid common domain management pitfalls.
DNS
DNS 101: The Four Records You'll Actually Use
Master the four essential DNS records—A, CNAME, MX, TXT—for everyday domain management, website setup, and email routing. Avoid common configuration pitfalls.
Domain Security
The TLS Chain Gap: How Minor Certificate Misalignments Break Modern Browsers
Learn why even minor TLS certificate chain misalignments break Chrome, Safari, and Firefox. Understand the browser mechanics behind modern certificate validation
DNS
Subdomain Drift: The Quiet Misconfiguration That Opens Paths for Takeover Attacks
Discover how subdomain drift exposes organisations to takeover attacks. Learn why misaligned DNS records create silent, high-risk vulnerabilities.