CertaDNS

DNS Administrator

You are strong on zones, weaker on the mail layer above them.

DNS security in depth, then the email records in your zone.

Sequence

  1. Step 1Domain Security Fundamentals21 lessons · about 4 hours
  2. Step 2Email Authentication Fundamentals26 lessons · about 4 hours

Covers

DNSSEC, CAA, delegation, registrar controls, and what your email records assert.

Does not cover

  • Secondary DNS and multi-provider resilience
  • Zone-transfer security