Email Validation Features
Everything you need to clean your email lists, reduce bounces, and protect your sender reputation — all on one platform.
Implemented Live Features
Syntax & Format Validation live
RFC-compliant syntax check. Validates email length (max 254 chars), local part (max 64 chars), domain structure, and allowed characters before any network call. Instant result.
MX Record Lookup live
Resolves DNS MX records to verify the domain has an active mail server. Domains without MX records are instantly flagged as invalid — no server means no mailbox.
SMTP Handshake Verification live
Core engine: connects directly to the recipient's mail server and performs a full SMTP dialogue (HELO → MAIL FROM → RCPT TO). Confirms whether the mailbox exists — without sending a single email.
Disposable Email Detection live
Flags addresses from 8,000+ known disposable and temporary email providers: Mailinator, GuerrillaMail, 10MinuteMail, YOPmail, Temp-Mail, ThrowAwayMail, and thousands more. Keeps your list clean of burner accounts.
Catch-All Domain Detection live
Identifies domains configured to accept all recipients regardless of whether the mailbox exists. Marked as catch-all so you can decide whether to include or quarantine those addresses.
Bulk Excel Verification live
Upload .xlsx files with thousands of emails. Include Name, Company, or any other columns — we keep them and append verification status. You can also paste up to 5,000 addresses (emails only). Live progress tracking, then download color-coded Excel results.
IP Rotation & Smart Throttling live
Dedicated pool of source IP addresses rotated across SMTP probes. Intelligent rate limiting spreads verification evenly across the hour (300 checks/h) to protect IP reputation and avoid blacklisting.
Yahoo, AOL & Outlook Handling live
Specialized handling for providers that obscure mailbox status. Delayed SMTP handshake (4-second polite delay), response fingerprinting (TSS09, 252), and accept-all cluster detection with dedicated IP.
Auto-Recovery & Slow Mode live
If SMTP connections start timing out (rate-limited by provider), the processor automatically enters slow mode to avoid hitting limits, then instantly resumes full speed when the server recovers. No manual intervention needed.
Confidence Scoring live
Every result includes a confidence level: high (definitive SMTP answer), medium (strong indicators), low (provider obscures status). Transparent — you know exactly how reliable each result is.
Greylist Retry Logic live
When a mail server temporarily defers (SMTP 4xx / greylisting), the system automatically retries after a delay — up to 2 retries with exponential backoff. No more "try again later" dead ends.
SMTP Response Fingerprinting live
Raw SMTP responses are analyzed with pattern matching to distinguish real mailbox errors ("mailbox unavailable") from IP blocks ("TSS09"), rate limits, and ambiguous provider responses.
Mobile-Responsive UI live
Full mobile support — live table adapts from desktop columns to a stacked card layout on phones. All data columns (Email, Status, MX Server, Source IP, Time) remain visible on every screen size.
History & Auto-Refresh live
Last 200 verifications stored with full audit trail (status, MX server, source IP, timestamp). History page auto-refreshes every 10 seconds — no F5 needed.
Excel Export with Color Coding live
Download verified results as .xlsx with your original columns intact (Name, Company, …) plus color-coded status: green for valid, red for invalid/error, yellow for catch-all. Ready to import into any CRM.
Free Tier — 200 Single Checks live
Every registered user gets 200 free single email verifications per month. No credit card, no trial period — just sign up, confirm your email, and start verifying. Monthly quota resets automatically. Upgrade for more volume and bulk features.
Secure Authentication live
Password hashing with bcrypt, session management via Flask-Login, HTTPS-only secure cookies with SameSite protection. Your data and account are safe.
CET Timezone & Live Timestamps live
All verification timestamps displayed in CET timezone with HH:MM:SS precision. Every result shows exactly when the check was performed.
Typo Correction live
200+ typo detection rules covering Gmail, Yahoo, Outlook, Hotmail, ProtonMail, Zoho and 50+ providers. Instant suggestions appear after verification: gmial.com → gmail.com, yaho.com → yahoo.com, hotmial.com → hotmail.com. Also catches TLD mistakes (.con → .com), transposed letters, and uses fuzzy matching for rare domains.
REST API & Developer Portal live
Programmatic access with API keys. Interactive docs at
/docs (OpenAPI 3 + Swagger UI).
Endpoints: /api/v1/verify, /api/v1/bulk,
/api/v1/account, /api/v1/credits.
X-API-Key header auth. Optional outbound webhooks on verify/bulk.
Spam Trap Detection live
Curated honeypot database flags known spam trap domains and local-part
patterns before SMTP. Returns status spam_trap (free — no
credits). Every result includes is_spam_trap for list hygiene
and deliverability protection.
WordPress Plugin live
North Email Validator — real-time email validation inside WordPress. Validates on 12+ form builders: CF7, WPForms, Gravity Forms, WooCommerce, Ninja Forms, Fluent Forms. Bulk validate from WP Admin (CSV/TXT, up to 5,000). Dashboard widget with credit balance. Block disposable & invalid at registration.
Zapier Integration live
Connect Email Validator to 2,000+ apps without code. Auto-validate emails when new contacts hit Mailchimp, HubSpot, Salesforce, Typeform, Google Sheets. Triggers: new subscriber, new lead, new form entry. Actions: validate, tag, filter, block.
Google Sheets Add-on live
Validate emails directly in Google Sheets. One-click bulk verification of entire columns. Full SMTP validation with color-coded results (valid/invalid/risky/disposable). Sidebar with live credit balance. Google Apps Script — no install needed.
Subscription Plans & Billing live
Tiered plans via Lemon Squeezy: Free (200 checks/month), Credit Packs (pay-as-you-go, credits never expire), Subscription (monthly renewal, 5K–100K checks). Secure checkout, automatic delivery, purchase history, and self-service cancellation from your dashboard.
Analytics Dashboard live
Interactive charts at /analytics — daily volume, status breakdown, top domains, deliverable rate. Filter by 7/30/90 days.
HubSpot Integration live
Connect HubSpot CRM with a Private App token. Import static lists,
bulk validate contacts, sync ev_status and
ev_confidence properties back to HubSpot.
Domain Pattern API live
GET /api/v1/domain-pattern?domain=acme.com — discover
known email format (e.g. first.last@) from Email Finder cache.
Free lookup, no credits.
Deliverability Suite live
/deliverability — combine blacklist monitors
with DNS health (SPF, DMARC, DKIM, MX). Free tier: 10 domain health checks/day.
Deliverability plan ($9/mo) adds unlimited health checks,
15 blacklist monitors (6h scans), and 200 verifications/month.
Catch-all scoring includes AI-style risk insight when scoring=true.
Role Account Detection live
Flags generic/role-based addresses like
admin@, info@, support@ via
is_role_account.
Gibberish Detection live
Detects random locals (asdfgh@, keyboard walks) via
is_gibberish and may downgrade to risky.
Free Provider Flag live
is_free_provider for Gmail, Outlook, Yahoo, iCloud,
Proton and other consumer webmail — useful for B2B scoring.
Email Finder live
Find verified emails by name + domain. Discovers patterns and SMTP-validates candidates until a real address is found.
Blacklist Monitor live
Monitor domains/IPs against 110+ DNSBLs with email alerts on reputation changes. Free tier: 1 monitor.
Email Scoring live
Composite quality score (0–10) via ?scoring=true —
MX reputation, SMTP quality, catch-all insight. No extra credits.
Bulk API live
Verify up to 50 emails per request via
POST /api/v1/bulk. Same credit rules as single verify.
Outbound Webhooks live
Pass webhook_url on verify/bulk. Signed JSON via
X-EV-Signature. HTTPS only.
PDF Export Reports live
Download analytics summaries as PDF from the Analytics dashboard for clients and compliance audits.
CLI Tool live
Command-line verification for DevOps — download the CLI, pipe lists, export JSON/CSV.
PHP & Python Client Libraries live
Native SDKs — PHP / Composer and Python / pip.
Browser Extension live
One-click verification from Chrome/Firefox — install the extension.
Planned Coming Soon
Make.com & n8n Templates soon
Ready-made automation blueprints alongside Zapier for no-code workflows across CRMs and form tools.
Slack / Discord Alerts soon
Push blacklist listing changes and bulk job completion into your team channels.
Salesforce & Pipedrive soon
Native CRM connectors similar to HubSpot — sync verification status back to contacts and leads.
Ready to clean your email list?
Start verifying emails in under 30 seconds. No credit card required.