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Email infrastructure of loc.gov

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 SPFProofpoint
SaaS senders in SPFnone detected
DMARC policyp=none
DMARC recordv=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
Snapshot2026-07-13 (updated daily)

Frequently asked questions

What email provider does loc.gov use?

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.

What ESP does loc.gov use?

loc.gov authorises Proofpoint in its SPF record as of July 13, 2026.

Does loc.gov enforce DMARC?

No — loc.gov publishes p=none, which only monitors and does not block spoofing (as of July 13, 2026).

DNS records say who should deliver your mail — they don't say whether it lands in the inbox. Run a free inbox placement test for loc.gov at Gmail, Outlook, Yandex and Mail.ru.
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