English
Free Bulk Email Verification
Paste up to 500 emails and instantly identify invalid, disposable, and role-based addresses. Reduce bounce rates, protect your sender reputation, and make every send count — no signup needed.
Drop CSV or TXT file here, or click to browse
Up to 500 emails per batch · No signup required · Results downloadable as CSV
Type or paste email addresses (one per line) directly into the input box, or upload a CSV / TXT file. Our single email verifier is also available for one-off checks.
Click Verify Emails. Each address goes through format, DNS, MX, disposable, and role-based checks simultaneously. Results appear in seconds — scored and colour-coded for fast review.
Export results as a CSV with full status details (valid / risky / invalid) and per-check breakdowns. Then load your clean list into your email outreach tool and send with confidence.
Flags addresses that violate RFC 5322 syntax — missing @, invalid characters, malformed domains — before any network call is made.
Resolves the domain via DNS to confirm it actually exists. Unresolvable domains are a hard bounce waiting to happen.
Queries the domain's mail exchange records. A domain without MX records cannot receive email — these are guaranteed non-deliverable addresses.
Identifies temporary inbox services (Mailinator, Guerrilla Mail, and 1,000+ providers) that are commonly used to bypass sign-up forms.
Detects shared-inbox prefixes (admin@, info@, support@, noreply@) which hurt engagement metrics and often trigger spam filters.
Every address receives a 0–100 deliverability score combining all checks, letting you set a threshold and filter your list programmatically.
Hard bounces above 2% can get your sending domain blacklisted. Removing invalid addresses before you hit send keeps your B2B lead generation campaigns safely below that threshold.
ISPs score every domain that mails through them. Verified lists mean fewer spam complaints, better inbox placement, and a sender score that improves over time rather than eroding.
When you send only to real, engaged inboxes, your open rate metrics reflect genuine interest — not bot clicks or dead accounts. Cleaner data means better decisions.
Most ESP pricing is based on sends, not opens. Eliminating invalid addresses from your list before sending directly reduces cost per delivered email — especially at scale.
Verify prospect lists exported from CRMs or enrichment tools before launching outbound campaigns. Use the Email Permutator to generate address variations, then bulk-verify which format actually exists.
Re-validate subscriber lists before seasonal campaigns or list reactivation sends. A clean list delivered via a trusted email marketing platform consistently outperforms a large, dirty list.
Deliver cleaner, more valuable contact data to clients by running every exported list through bulk verification before handoff. Pair with Lessie AI for end-to-end B2B lead generation workflows.
Clean up acquisition and win-back lists before sending. Removing invalid addresses from transactional flows prevents delivery failures that could affect customer experience and revenue.
