vrfymail
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Email verification for Developers

272,228+

disposable domains in the blocklist · ● updated daily

1,192 more being analyzed right now

Catch typos, role accounts, disposable mailboxes, and spam traps in a single call. The only verifier that keeps a per-customer bounce history so your signal stays yours.

Founders deal closed

Thanks to our first 100 signups — they're locked in at 10,000 verifies / month for life. New free accounts start at 5,000 verifies / month.

Start free — 5,000 verifies / month For AI builders →

No credit card. Free tier never expires.

terminal
bash 
curl https://vrfymail.com/v1/check \
  -H "Authorization: Bearer vk_live_..." \
  -d '{ "email": "ada@example.com", "strict": true }'
response.json
json 
{
  "result": "deliverable",
  "reason": "valid_mailbox",
  "disposable": false,
  "spam_trap": false,
  "mx_found": true,
  "score": 0.98,
  "did_you_mean": null,
  "trap": { "listed": false, "lists": [], "code": null },
  "account_history": { "matched": false }
}

Static lists are a 2018 product.

vrfymail ships the checks the rest skip — and learns from your actual bounces so it gets better the more you use it.

Real-time spam-trap detection

Authenticated Spamhaus DBL probes on every verify, with caching at the edge. Hits self-persist so future calls short-circuit at 1ms.

Per-customer bounce overlay

Forward your ESP bounce webhook once. The verifier learns YOUR bad addresses without leaking that signal to anyone else.

Sub-100ms typical latency

Hosted on Cloudflare's edge in 300+ cities. MX lookups and DNSBL probes run in parallel, never serialized.

Strict mode for B2C signups

Catches throwaway local-parts, plus-aliases, gmail dot tricks, sequential keyboard mashes — the patterns static lists miss.

Self-growing data, not a static list

272K+ blocked domains: bundled seed, daily scrapers, DBL hits, customer-consensus promotion. Your moat compounds as traffic grows.

One key, no SDK required

A single endpoint, JSON in, JSON out. Drop into any AI-coded signup form in under a minute — fetch is enough.

Latest deep dives

All posts →
Investigation

Yopmail's empire: 4 brands, 654 domains, one MX

tempmail.com, wuuvo.com, 0-mail.com — tracing the park-mx.above.com infrastructure behind every Yopmail brand.
Mechanism

The alias forwarder trick: 707 domains that forward to a real Gmail

How one Gmail account signs up to your form 50 times under 50 different "different" addresses.
The graph

The 638 operators behind every disposable email domain

Top 10 operators control 58% of 265K+ disposable domains. The operator graph nobody else publishes.
Verification pipeline

Cheap checks first. Network calls only when they matter.

Every verify short-circuits as soon as a verdict is locked. Most requests never hit the network — they finish in single-digit milliseconds against a D1 row.

  1. Syntax
    RFC-leaning shape check
    0ms
  2. Typo correction
    Damerau-Levenshtein vs top providers
    0ms
  3. Role detection
    info@, admin@, noreply@
    0ms
  4. Strict-mode flags
    plus-aliases, gibberish, runs
    0ms
  5. Account history
    your customer's bounce overlay
    1 D1 read
  6. Disposable + spam-trap DB
    272K+ entries, self-growing
    1 D1 read
  7. MX + DBL probe
    DoH in parallel
    50–150ms

One key. One endpoint. Done.

Spin up a free account, paste the curl into your AI editor, and ship a verified signup form before your coffee gets cold.

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