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Is .fyi safe? The state of .fyi domain security
.fyi is riskier than the internet average. Across 47,493 graded .fyi domains, 83.9% score an F — worse than the 73.8% global average — heavier on exposed domains than the web as a whole. 2% earn a B or better. Most .fyi domains can still be impersonated in email, but the ending shifts the odds, not your own domain's grade. As of 2026-07-29.
How do .fyi domains score?
Aggregate grade distribution across all graded .fyi domains — we never publish an individual business's grade. As of 2026-07-29.
| Grade | Domains | Share |
|---|---|---|
| A+ | 24 | 0.1% |
| A | 179 | 0.4% |
| B | 746 | 1.6% |
| C | 2,594 | 5.5% |
| D | 4,082 | 8.6% |
| F | 39,868 | 83.9% |
Does .fyi make a domain secure?
No — and that's the most important thing to know. A domain's grade is decided by how it is configured (SPF, DMARC, HTTPS, DNS), not by its ending. Choosing .fyi doesn't protect you, and a high-F-share ending doesn't doom you: a correctly configured .fyi domain earns an A while the crowd around it sits at F.
Want to know where your .fyi domain ranks? Check it privately and free — we only ever show an individual domain's grade to its verified owner. Run the free check →
Frequently asked questions
Is .fyi safe?
On average, .fyi is riskier than the internet average: 83.9% of its 47,493 graded domains score an F as of 2026-07-29, against a 73.8% global average. Most domains on every ending are exposed — the ending shifts the odds, not your own domain's grade.
How secure are .fyi domains?
16.1% of .fyi domains score above an F and 2% earn a B or better. The rest fail the basic externally observable protections, most importantly enforced SPF and DMARC, so they can be impersonated in email.
Does choosing .fyi make my domain secure?
No. A domain's grade comes from how it is configured — SPF, DMARC, HTTPS, DNS — not from its ending. A well-configured domain earns an A on any ending; an unconfigured one sits at F on .fyi too.
What does "grade F" mean for a .fyi domain?
It fails the basic protections we can observe from outside — above all, it has no enforced SPF and DMARC, so its email can be forged and its customers targeted with convincing fakes.
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