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According to Live Direct Marketing's daily DNS scan (July 13, 2026), c-span.org (Tranco rank #7,478) receives mail via Microsoft 365 and sends through HubSpot, Mailchimp. Its DMARC policy is p=none (monitor only) — like the majority of DMARC publishers (53% don't enforce).
| Mailbox provider (MX) | Microsoft 365 |
|---|---|
| ESPs in SPF | HubSpot, Mailchimp |
| SaaS senders in SPF | none detected |
| DMARC policy | p=none |
| DMARC record | v=DMARC1; p=none |
| Tranco rank | #7,478 |
| Snapshot | 2026-07-13 (updated daily) |
c-span.org 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.
c-span.org authorises HubSpot, Mailchimp in its SPF record as of July 13, 2026.
No — c-span.org publishes p=none, which only monitors and does not block spoofing (as of July 13, 2026).