Big Tech
Email security of 24 Big Tech domains
The platforms everyone else defers to on security — measured against the same email-authentication checklist.
Across these 24 domains, 100% publish SPF, 100% publish DMARC and 87.5% enforce it (reject or quarantine), 12.5% sit on p=none, and 54.2% sign with DKIM. Scanned June 24, 2026.
Every domain in this cohort
| Domain | SPF | DMARC | DKIM | MTA-STS | TLS-RPT |
|---|---|---|---|---|---|
| adobe.com | Hardfail | Reject | Yes | No | No |
| alphabet.com | Hardfail | Quarantine | Yes | No | No |
| amazon.com | Hardfail | Quarantine | No | No | No |
| amd.com | Softfail | Quarantine | Yes | No | No |
| apple.com | Softfail | Quarantine | Yes | No | No |
| broadcom.com | Softfail | Reject | Yes | No | Yes |
| cisco.com | Present | Reject | Yes | No | No |
| dell.com | Softfail | Reject | No | No | No |
| facebook.com | Present | Reject | No | Yes | Yes |
| google.com | Softfail | Reject | No | Yes | Yes |
| hp.com | Softfail | Reject | Yes | No | No |
| ibm.com | Hardfail | Reject | No | No | No |
| meta.com | Present | Reject | No | No | No |
| microsoft.com | Hardfail | Reject | Yes | Yes | Yes |
| netflix.com | Hardfail | Reject | Yes | No | No |
| nvidia.com | Softfail | Reject | Yes | No | No |
| oracle.com | Softfail | Reject | No | No | No |
| qualcomm.com | Softfail | Reject | No | Yes | Yes |
| salesforce.com | Softfail | Reject | Yes | No | No |
| sap.com | Present | Reject | Yes | No | Yes |
| tsmc.com | Hardfail | Reject | Yes | No | No |
| intel.com | Hardfail | None (monitor) | No | No | No |
| samsung.com | Softfail | None (monitor) | No | No | No |
| sony.com | Hardfail | None (monitor) | No | No | No |
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