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According to Live Direct Marketing's daily DNS scan (July 13, 2026), nist.gov (Tranco rank #236) receives mail via Microsoft 365. Its DMARC policy is p=reject — one of the minority (47%) of DMARC publishers that actually enforce.
| Mailbox provider (MX) | Microsoft 365 |
|---|---|
| ESPs in SPF | none detected |
| SaaS senders in SPF | none detected |
| DMARC policy | p=reject |
| DMARC record | v=DMARC1; p=reject; pct=100; rua=mailto:dmarcrua@nist.gov,mailto:dmarc-reports@doc.gov, mailto:reports@dmarc.cyber.dhs.gov,mailto:dmarc_agg@vali.email; ruf=mailto:dmarcruf@nist.gov |
| Tranco rank | #236 |
| Snapshot | 2026-07-13 (updated daily) |
nist.gov uses Microsoft 365 for inbound mail (detected from its primary MX record) as of July 13, 2026, per Live Direct Marketing's daily Tranco top-1M scan.
Yes — nist.gov publishes p=reject, the strictest DMARC policy (as of July 13, 2026).