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According to Live Direct Marketing's daily DNS scan (July 13, 2026), loc.gov (Tranco rank #619) receives mail via Unknown / Other and sends through Proofpoint. Its DMARC policy is p=none (monitor only) — like the majority of DMARC publishers (53% don't enforce).
| Mailbox provider (MX) | Unknown / Other |
|---|---|
| ESPs in SPF | Proofpoint |
| SaaS senders in SPF | none detected |
| DMARC policy | p=none |
| DMARC record | v=DMARC1;p=none;sp=none;fo=1;rua=mailto:locdmarc_reports@loc.gov;ruf=mailto:locdmarc_ruf@loc.gov;rf=afrf;pct=100 |
| Tranco rank | #619 |
| Snapshot | 2026-07-13 (updated daily) |
loc.gov uses Unknown / Other for inbound mail (detected from its primary MX record) as of July 13, 2026, per Live Direct Marketing's daily Tranco top-1M scan.
loc.gov authorises Proofpoint in its SPF record as of July 13, 2026.
No — loc.gov publishes p=none, which only monitors and does not block spoofing (as of July 13, 2026).