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Email Verifier

Verify email addresses by checking domain existence, MX records, mail server configuration, and syntax. Supports bulk verification with exportable results. Free online email verifier.

About Email Verifier

Email Verifier is a free online tool that checks whether an email address can actually receive mail — going beyond syntax to verify the domain's DNS records and MX (Mail Exchange) configuration. Before you send a campaign, clean your list by confirming every domain exists and has working mail servers.

The tool performs a four-step verification: syntax check, domain DNS resolution, MX record lookup, and mail server analysis. It shows the full MX record table with server priorities so you can see exactly how the domain's email infrastructure is configured. Supports single and bulk verification with CSV export.

Features

  • 4-step verification: Syntax → Domain DNS → MX Records → Mail server analysis
  • MX record details: Shows all mail servers with priority rankings
  • Domain DNS check: Confirms domain resolves to an IP address
  • Provider detection: Identifies Google Workspace, Microsoft 365, Zoho, ProtonMail, and other major providers
  • Visual status pipeline: Step-by-step verification progress with pass/fail indicators
  • Bulk verification: Process up to 500 emails at once with real-time progress
  • Sortable results: Filter bulk results by status (verified, failed, warning)
  • CSV export: Download results with all verification details
  • Domain caching: Same domain checked once — speeds up bulk processing

How to Use

  1. Enter an email: Type or paste an email address and click Verify.
  2. Review the pipeline: Watch each verification step complete — syntax, domain, MX records.
  3. Examine MX records: See the full list of mail servers with priorities.
  4. Bulk mode: Switch to Bulk, paste multiple emails, and click Verify All.
  5. Export results: Download the verification report as CSV.

Examples

Gmail address: user@gmail.com → ✅ Domain exists, 5 MX records found (Google mail servers), provider: Google

Dead domain: user@thisdoesnotexist12345.com → ❌ Domain does not resolve — no DNS records

Domain without mail: user@example.com → ⚠️ Domain exists but has no MX records — cannot receive email

Benefits

  • Reduce bounces: Catch dead domains and missing MX records before sending
  • Protect sender reputation: High bounce rates damage your domain's email deliverability score
  • Deeper than syntax: A properly formatted email can still bounce if the domain has no mail server
  • Bulk processing: Clean entire lists in minutes with domain-level caching
  • Know the provider: See if recipients use Gmail, Outlook, or other providers
  • Free to use: No account required, CSV export included

Frequently Asked Questions

What does this email verifier check?
It performs four levels of verification: (1) syntax validation against RFC standards, (2) domain existence via DNS lookup, (3) MX record verification to confirm the domain can receive email, and (4) mail server analysis showing priority and server hostnames.
What is an MX record?
MX (Mail Exchange) records are DNS entries that specify which mail servers are responsible for receiving email for a domain. If a domain has no MX records, it cannot receive email — meaning any address at that domain will bounce.
Does this tool send an email to verify the address?
No. This tool checks domain-level infrastructure (DNS and MX records) without sending any email or connecting to SMTP servers. It confirms the domain can receive mail but does not verify the specific mailbox exists.
What does the domain check tell me?
The domain check performs a DNS lookup to confirm the domain actually exists and resolves to an IP address. A domain that doesn't resolve means it's either expired, misconfigured, or fake — and all emails to it will fail.
Can I verify multiple emails at once?
Yes. Switch to Bulk Mode and paste up to 500 email addresses. The tool verifies each one and provides a sortable results table with status indicators that you can export as CSV.
Why does it show multiple MX servers?
Most domains have multiple MX records with different priorities for redundancy. If the primary server (lowest priority number) is down, email is delivered to the backup server. This is normal and indicates a well-configured domain.
Are the email addresses stored or logged?
DNS lookups are performed by your server but no email addresses or results are stored, logged, or shared with any third party.

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