Build a Deliverability Baseline

Going live without a baseline means every future warning feels new, even when the issue has existed for weeks.

Build the baseline from

  • One stable sender domain
  • One known-good provider configuration
  • A representative message template
  • A repeatable test workflow

Keep track of

  • Authentication results
  • Routing and DNS warnings
  • Link structure
  • Content and attachment patterns

Once you trust one configuration, compare future changes against it instead of guessing from memory.