Upload your list. Get clean results. Remove invalid, disposable, and risky addresses before they damage your sender reputation.
No technical knowledge required. Upload, verify, download.
Upload a CSV, XLS, XLSX, or TXT file with up to 100,000 email addresses. Or paste emails directly into the dashboard — no file needed for smaller lists.
Our engine runs multi-layer checks: SMTP handshake, MX lookup, syntax validation, disposable domain detection, and role-based filtering — all in parallel.
Get a detailed CSV with every email categorised. Filter by result type, download only the valid addresses, and import back to your ESP immediately.
Every email gets a precise classification so you know exactly what to do with it.
The address exists, the mailbox is reachable, and the domain accepts mail. Safe to send.
The address doesn't exist or the domain rejects mail. Remove immediately to protect your sender score.
The domain accepts all incoming mail regardless of the local part. Deliverability is uncertain — send with caution.
Created via a disposable email service (Mailinator, Guerrilla Mail, etc.). Remove to eliminate low-quality signups.
Addresses like admin@, info@, support@ go to shared inboxes. High spam-complaint risk — suppress from marketing sends.
The server didn't respond definitively — often due to grey-listing or rate limits. Retry or treat conservatively.
CSV, XLS, XLSX, TXT — upload any common format. Or paste up to 10,000 emails directly without a file.
Watch your list being verified in real time. No waiting for an email — your dashboard updates live as results come in.
Download all results or filter by status. Export only valid emails, or get separate files per result category.
Automatic deduplication before verification so you never waste credits verifying the same address twice.
All data encrypted in transit and at rest. Lists auto-deleted 15 days after verification. No data shared with third parties.
Automate bulk verification via our API. Submit lists programmatically, poll for progress, and download results — all without the dashboard.
Pay only for what you verify. Credits never expire.
Need more? See all credit tiers →
Zuhal supports CSV, XLS, XLSX, and TXT file formats for bulk email verification. You can also paste up to 10,000 email addresses directly into the dashboard without uploading a file.
Each bulk upload supports up to 100,000 email addresses. For lists larger than 100,000, split them into multiple uploads. Processing speed is typically 500,000–1,000,000 emails per hour.
Zuhal delivers 99.5%+ accuracy using multi-layer SMTP handshake verification, MX record lookups, syntax validation, disposable domain detection, and role-based address flagging.
No. Zuhal uses DNS and SMTP protocols to verify email addresses without ever sending a message. The verification is completely non-intrusive and invisible to the recipient.
Yes. Zuhal does not store your email lists beyond the verification period. Lists are automatically deleted 15 days after upload or validation. Zuhal is fully GDPR compliant and your data is never shared with any third party.
Get 100 free credits and see why thousands of marketers trust Zuhal to keep their lists deliverable and their sender scores high.
Start Verifying Free — No Card Required100 free credits · No credit card · Results in minutes