Sendpath

Deliverability fundamentals

Inbox placement is mostly authentication, consistent sending identity, engagement quality, and complaint control. SPF, DKIM, and DMARC are table stakes. Everything else is operational discipline.

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Lesson objectives

  • Implement SPF, DKIM, and DMARC correctly for a sending domain
  • Read reputation signals without inventing vanity metrics
  • Run a practical deliverability audit before a big send

Lessons in this course

  1. 1. Authentication: SPF, DKIM, and DMARC22 min

    The three DNS records every sending domain needs.

  2. 2. Inbox placement and reputation20 min

    Warmup, engagement, complaints, and mailbox provider expectations.

How this course fits the path

Authentication, reputation, list hygiene, and inbox placement without mythology. Continue with the next course in the learning path, keep the glossary open for definitions, and use checklists when you apply the material to a live send.