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According to Live Direct Marketing's daily DNS scan (July 13, 2026), nationalarchives.gov.uk (Tranco rank #4,785) receives mail via Microsoft 365 and sends through Mailgun, Amazon SES. 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 | Mailgun, Amazon SES |
| SaaS senders in SPF | Shopify |
| DMARC policy | p=reject |
| DMARC record | v=DMARC1;p=reject;sp=reject;fo=1;rua=mailto:dmarc-rua@dmarc.service.gov.uk;ruf=mailto:dmarc-ruf@dmarc.service.gov.uk |
| Tranco rank | #4,785 |
| Snapshot | 2026-07-13 (updated daily) |
nationalarchives.gov.uk 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.
nationalarchives.gov.uk authorises Mailgun, Amazon SES in its SPF record as of July 13, 2026.
Yes — nationalarchives.gov.uk publishes p=reject, the strictest DMARC policy (as of July 13, 2026).