Enterprise Email Infrastructure & DNS

Five lessons covering enterprise email infrastructure at depth: DNS records and how email routing actually works, building and maintaining the full authentication stack (SPF, DKIM, DMARC), designing mail routing architecture for complex organisations, consolidating domains through M&A, and enforcing DLP and compliance across every subsidiary centrally.

Lessons

  1. DNS Fundamentals for Email

    How DNS actually routes mail — before you touch a single policy.

    intermediate

  2. Email Authentication Stack

    SPF, DKIM, and DMARC — configured correctly, not just present.

    intermediate

  3. Enterprise Mail Routing Architecture

    Smart hosts, connectors, and routing every domain through one backbone.

    intermediate

  4. M&A Email Integration

    Consolidating domains post-acquisition without dropping a single message.

    intermediate

  5. DLP & Compliance Enforcement at Scale

    One policy engine. Every subsidiary. Auditable from day one.

    intermediate