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Xpertech LABS

Free utility

Free Bulk Email Verifier

Paste a list or import a CSV / Excel file. We check every address for format errors, typos, temporary inboxes, role addresses and a live mail server — then give you a clean list.

Your list stays in your browser. Only domain names are looked up on public DNS.

0 unique emails found

How to use it

  1. 01

    Paste emails or import a CSV / Excel file — we pull every address out automatically.

  2. 02

    Press Verify. Each domain is checked once, so big lists stay fast.

  3. 03

    Download the clean list and send only to “Safe to send”.

Good to know

  • “Safe to send” means every free check passed: correct format, real domain, live mail server, not temporary, not a role inbox.
  • No free tool can promise a specific mailbox exists — many servers accept everything and bounce later. Send a small first batch and watch bounces.
  • “Will bounce” covers bad format, typos, domains that don't exist or can't take email, and temporary inboxes.
  • Role addresses like info@ or sales@ are marked risky because they bounce and complain more often.

Common questions

Does it send test emails?

No. Nothing is sent to anyone. We only look up public DNS records for each domain.

Is my list uploaded?

No. The list stays in your browser tab. Only domain names (the part after @) are looked up.

How many emails can I check?

Up to 50,000 at a time.

Need more than a quick tool?

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See B2B Lead Finder →

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Want cold email run for you, from domains to replies? Our Outreach Lab handles it.

Explore the Outreach Lab →