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According to Live Direct Marketing's daily DNS scan (July 12, 2026), columbia.edu (Tranco rank #1,022) receives mail via Proofpoint. Its DMARC policy is p=none (monitor only) — like the majority of DMARC publishers (53% don't enforce).
| Mailbox provider (MX) | Proofpoint |
|---|---|
| ESPs in SPF | none detected |
| SaaS senders in SPF | none detected |
| DMARC policy | p=none |
| DMARC record | v=DMARC1; p=none; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com; |
| Tranco rank | #1,022 |
| Snapshot | 2026-07-12 (updated daily) |
columbia.edu uses Proofpoint for inbound mail (detected from its primary MX record) as of July 12, 2026, per Live Direct Marketing's daily Tranco top-1M scan.
No — columbia.edu publishes p=none, which only monitors and does not block spoofing (as of July 12, 2026).