Is Spare Mailbox secure?

Legit.Show measured Spare Mailbox's Security frame at 45/100. Security headers present: HSTS. Served over HTTPS with a valid certificate.

How does Legit.Show measure Spare Mailbox?

Legit.Show scores seven frames — Performance, Accessibility, Security, Privacy, Reliability, Standards and Discoverability — deterministically from the public surface (URL, HTTP headers, real Lighthouse), with no LLM in the scoring path. See legit.show/methodology.

Developer Tools

Spare Mailbox

Last updated 2026-10-07 · benchmark measured 2026-10-07 — deterministic & reproducible

Spare Mailbox provides disposable temporary email addresses with a 24-hour retention policy.

84/100

7/7 frames

Legit Benchmark — the simple average of 7 measured frames. Frames we could not measure are left out of the average, never counted as zero. Every frame is shown below with its evidence.

Checked 2026-10-07 · scores move as sites change

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To cite this score: legit.show/s/sparemailbox-com/2026-10-07. That address never changes; this page moves with every re-measure.

Legit.Show scored Spare Mailbox 84/100 on 2026-10-07, measured across all 7 frames from its public surface. legit.show/s/sparemailbox-com/2026-10-07

Is Spare Mailbox production-ready?

Legit.Show scores Spare Mailbox 84 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Spare Mailbox (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Security. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

Performance — 90/100
Accessibility — 96/100
Security — 45/100
How this compares across the catalogue: The Web Security Baseline
Privacy — 75/100
How this compares across the catalogue: The Privacy Gap
Reliability — 100/100
Standards — 89/100
Discoverability — 90/100

What we measured

Security headers present: HSTS.
No Content-Security-Policy.
Served over HTTPS with a valid certificate.
Real Lighthouse performance run — 151 ms to first byte.
Returns a proper 404 for unknown routes.
3 of 3 sampled routes reachable.
Has a reachable privacy policy.
Sets cookies / loads scripts with no consent prompt.

Who it's for

Developers testing signup flows · QA automation engineers · Users avoiding spam signups · Test suite automation · Privacy-conscious users

Pricing

Free tier available; paid plans on RapidAPI raise request quota

Sources and updates

Description: Taken from sparemailbox.com's own website on 2026-10-07.
Benchmark: Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-10-07.

Put together from public information, without Spare Mailbox's involvement. If anything here is wrong, tell us and a person will check it.

Visit Spare Mailbox → · Alternatives to Spare Mailbox → · How this was measured →