Verify Any Email Address
Down to the Socket.
Test individual inboxes live. We open a raw zero-send TCP handshake with recipient mail servers to confirm existence with 100% accuracy.
How 4-Level Deep Verification Works
Traditional tools only check syntax and MX records. SkoutIn goes 4 layers deep into the mail server's TCP socket to verify user existence with 0% bounce rate.
RFC Syntax & Burner Drop
Checks RFC 5322 compliance, eliminates invalid special characters, and instantly filters out 100+ temporary burner domains (Mailinator, 10MinuteMail, TempMail).
DNS & Primary MX Lookup
Performs asynchronous DNS & DNS-over-HTTPS queries to discover mail exchange records. Identifies Google Workspace, Microsoft 365, Zoho, and private corporate MTAs.
Port 25 Socket Handshake
Initiates a real TCP socket handshake directly with the target mail server. Sends HELO and RCPT TO to verify mailbox existence, then cleanly issues QUIT.
Catch-All & Firewall Probe
Detects "Accept-All" domains and security firewalls (Mimecast, Proofpoint, Barracuda) by probing randomized addresses. Distinguishes confirmed inboxes from false positives.
Clean 50,000+ Emails in Minutes
Drag and drop your raw CSV or Excel list. SkoutIn's asynchronous FIFO engine processes thousands of addresses in parallel, isolates bounces, and exports a 100% clean lead file ready for blast campaigns.
SkoutIn vs. Traditional Verifiers
Why leading agencies switch from standalone verification tools to SkoutIn's built-in engine.
| Capability | SkoutIn Verifier | NeverBounce | ZeroBounce | Hunter.io |
|---|---|---|---|---|
| Raw Port 25 Socket Handshake | ✓ Real Handshake | ✓ Yes | ✓ Yes | ~ Partial |
| Pricing Model | Included in Plan ($0/extra) | $0.008 / email | $0.008 / email | Per-search credits |
| Integrated Global Lead Vault & Warmup | ✓ Native All-in-One | ✗ No | ✗ No | ✗ No |
| Catch-All Risk Calibration | ✓ Multi-Probe | ✓ Yes | ✓ Yes | ✗ Basic |
| 1-Click Blast Campaign Import | ✓ Instant 1-Click | ✗ Manual CSV Export | ✗ Manual CSV Export | ✗ Manual CSV Export |