Defaults.Exposed › By TLD › .su
Is .su safe? The state of .su domain security
.su is riskier than the internet average. Across 89,868 graded .su domains, 86.4% score an F — worse than the 78.3% global average — heavier on exposed domains than the web as a whole. 0.6% earn a B or better. Most .su domains can still be impersonated in email, but the ending shifts the odds, not your own domain's grade. As of 2026-08-16.
Of 56,253 graded .su domains, 64.6% earn an F — well below the 73.8% internet-wide average. DMARC enforcement here stands at 4.3% — below the 11.8% census-wide rate.
How do .su domains score?
Aggregate grade distribution across all graded .su domains — we never publish an individual business's grade. As of 2026-08-16.
| Grade | Domains | Share |
|---|---|---|
| A+ | 21 | 0% |
| A | 56 | 0.1% |
| B | 489 | 0.5% |
| C | 2,623 | 2.9% |
| D | 9,018 | 10% |
| F | 77,661 | 86.4% |
Does .su 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 .su doesn't protect you, and a high-F-share ending doesn't doom you: a correctly configured .su domain earns an A while the crowd around it sits at F.
Want to know where your .su 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 .su safe?
On average, .su is riskier than the internet average: 86.4% of its 89,868 graded domains score an F as of 2026-08-16, against a 78.3% global average. Most domains on every ending are exposed — the ending shifts the odds, not your own domain's grade.
How secure are .su domains?
13.6% of .su domains score above an F and 0.6% 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 .su 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 .su too.
What does "grade F" mean for a .su 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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