DNSSEC for Email Operators: Worth It, and How Not to Break Everything
Every email trust decision resolves through DNS, and DNSSEC is what makes those answers tamper-proof. What it buys email, what DANE requires, and safe operations.
#DNS
5 articles with this tag
DNS for Email: The Records, TTLs, and Chains That Break Mail
Email is a DNS application. The full record inventory a sending domain needs, the TTL strategy for safe changes, and the misconfigurations that quietly break delivery.
SPF's 10-Lookup Limit: Includes, Flattening, and Permerror
Every include, a, mx, and redirect in your SPF record costs a DNS lookup, and the budget is ten. Why records break at scale and how to fix them without flattening regret.
DKIM Key Rotation: A Practical Guide for Production Environments
How to rotate DKIM keys in production without breaking signatures. Dual-selector strategy, 2048-bit key sizes, and the rotation cadence that actually works.
DKIM Explained: How a Signature Proves the Mail Is Yours
SPF authorises servers, DKIM authenticates messages. How the signing and verification cycle works, what each tag in the header does, and where signatures break.