Tools · Free email verifier
Clean lists free. Verify every mailbox before you send.
Strip invalid syntax, duplicates, disposable domains, and dead mail hosts in seconds locally, then run live SMTP and Catch-All checks at $0.01 per verified email.
Direct answer · Free email pre-check vs SMTP
What can a free email verifier check instantly, and how does Sorzio finish the job?
Full spec +
This free tool removes invalid syntax, duplicates, throwaway domains, and role aliases while checking live DNS MX and SPF records directly in your browser. To confirm whether the exact mailbox exists on a corporate server or sits behind a Catch-All gateway, Sorzio Verify runs real-time SMTP probes in Sheets, Claude MCP, and ChatGPT at $0.01 per succeeded email (2,000 covered by the $20 signup credit).
- Browser pre-check
- $0.00
- Live SMTP verify
- $0.01 / email
- Failed lookups
- $0.00
- Welcome credit
- Up to $20
Syntax, MX, SPF, dedupe, disposable
$10 per 1,000 succeeded rows
Zero charge on blanks or misses
Covers 2,000 live verifications
$0 pre-check locally · $0.01/email for full SMTP & Catch-All
$0 pre-check locally · $0.01/email for full SMTP & Catch-AllInstant syntax & hygieneCorporate syntax OK
Valid corporate domain format. Run real-time SMTP & Catch-All verification before sending.
- RFC syntax
- Valid
- Role inbox
- No (named)
- Disposable domain
- No
- B2B corporate host
- Yes
DNS mailserver & full SMTP step
Click Check live MX & SPF to verify mail exchange records via Cloudflare DNS-over-HTTPS directly from your browser.
DNS only proves the domain accepts email. For mailbox existence (
deliverable, undeliverable, catch_all, risky, unknown), run Sorzio Verify in Google Sheets, Claude MCP, or ChatGPT at $0.01/email (up to 2,000 free with $20 welcome credit).| Check layer | Free Browser Verifier | Sorzio Live Verify ($0.01/email) |
|---|---|---|
| RFC syntax, dupes, role & disposable | Instant local audit (up to 5,000 rows) | Included automatically |
| Live DNS MX & SPF lookup | Single-domain browser DoH lookup | Parallel domain check across 25,000 rows |
| Real-time SMTP mailbox & Catch-All probe | Requires authenticated server runner | 5 exact verdicts + $0 charge on errors |
| Where results land | Instant CSV download | Google Sheets, Claude MCP, ChatGPT, or Hosted Lists |
FAQ
Free email verifier questions, answered.
Direct answers on succeeded-row billing, 0% AI BYOK markup, Decision Mode gates, and Hosted Links.
It validates RFC 5322 email syntax, removes duplicate rows, flags disposable throwaway domains and role inboxes (such as info@ or support@), separates webmail from corporate B2B domains, and checks live DNS MX and SPF records directly from your browser at zero cost.
Checking whether a specific corporate mailbox actually exists without tripping anti-abuse filters requires authenticated server-side SMTP probes and Catch-All heuristics. Sorzio runs full real-time verification for $0.01 per succeeded email inside Google Sheets, Claude MCP, ChatGPT, and Hosted Lists, and every new workspace receives up to $20 in welcome credit (up to 2,000 free live verifications).
Sorzio returns five exact verdicts: deliverable, undeliverable, catch_all, risky, and unknown. You can route Catch-All Server or risky rows separately inside multi-step Flows at $0.00 checkpoint cost before running enrichment or AI copy.
No. Both syntax inspection and the 5,000-row CSV deduplicator execute 100% locally in your browser memory. When you are ready for live SMTP checks across up to 25,000 rows, connect Google Sheets or upload to a Hosted List in Sorzio.
Start with $20 free credit
See the batch price before you press run.
Every workspace starts on Free ($0/mo) with $5 instant credit at signup plus $15 with Auto-Reload. Run inside Claude, ChatGPT, Cursor, or Google Sheets and pay only for succeeded rows.