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According to Live Direct Marketing's daily DNS scan (July 13, 2026), jamanetwork.com (Tranco rank #1,887) receives mail via Proofpoint and sends through SMTP.com, Net-Results EmailCampaigns, Proofpoint. Its DMARC policy is p=reject — one of the minority (47%) of DMARC publishers that actually enforce.
| Mailbox provider (MX) | Proofpoint |
|---|---|
| ESPs in SPF | SMTP.com, Net-Results EmailCampaigns, Proofpoint, Brevo (ex-Sendinblue) |
| SaaS senders in SPF | none detected |
| DMARC policy | p=reject |
| DMARC record | v=DMARC1;p=reject;fo=1;rua=mailto:dmarc_rua@emaildefense.proofpoint.com;ruf=mailto:dmarc_ruf@emaildefense.proofpoint.com |
| Tranco rank | #1,887 |
| Snapshot | 2026-07-13 (updated daily) |
jamanetwork.com uses Proofpoint for inbound mail (detected from its primary MX record) as of July 13, 2026, per Live Direct Marketing's daily Tranco top-1M scan.
jamanetwork.com authorises SMTP.com, Net-Results EmailCampaigns, Proofpoint, Brevo (ex-Sendinblue) in its SPF record as of July 13, 2026.
Yes — jamanetwork.com publishes p=reject, the strictest DMARC policy (as of July 13, 2026).