Per-source-IP breakdown, sorted by message count (descending).
Earliest report-window start across all reports, or null if none had a valid date.
Latest report-window end across all reports, or null if none had a valid date.
Distinct policy domains seen across the reports, sorted.
Messages that failed DMARC.
Messages that passed DMARC.
Overall pass rate, 0-100 with one decimal.
Number of reports aggregated.
Total messages across all records.
Combined view across many reports, produced by aggregate. Extends DmarcSummary.