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According to Live Direct Marketing's daily DNS scan (July 12, 2026), dexcom.com (Tranco rank #10,663) receives mail via Microsoft 365 and sends through Salesforce. Its DMARC policy is p=reject — one of the minority (47%) of DMARC publishers that actually enforce.
| Mailbox provider (MX) | Microsoft 365 |
|---|---|
| ESPs in SPF | Salesforce |
| SaaS senders in SPF | none detected |
| DMARC policy | p=reject |
| DMARC record | v=DMARC1; p=reject; pct=100; fo=1; ri=3600; rua=mailto:a92318d4@inbox.us.redsift.cloud,mailto:dmarc.compliance@dexcom.com; ruf=mailto:a92318d4@inbox.us.redsift.cloud,mailto:dmarc.compliance@dexcom.com |
| Tranco rank | #10,663 |
| Snapshot | 2026-07-12 (updated daily) |
dexcom.com uses Microsoft 365 for inbound mail (detected from its primary MX record) as of July 12, 2026, per Live Direct Marketing's daily Tranco top-1M scan.
dexcom.com authorises Salesforce in its SPF record as of July 12, 2026.
Yes — dexcom.com publishes p=reject, the strictest DMARC policy (as of July 12, 2026).