What delivery receipts establish
Receipts can be delayed, unavailable, or defined differently by provider and channel. An absent receipt is not automatically a confirmed failure.
Putting the guide into practice
Store the source status, timestamp, and provider reference. Explain which denominator the report uses and keep unknown outcomes visible.
- Source status
- Coverage limits
- Unknown count
- Reporting definition
Limits and review decisions
Do not rename delivered messages as opens. Link clicks and replies measure other events and should be labeled separately.