- Home
- Free Tools
- Google Sheets add-ons
- Free Email Verifier
Free Email Verifier for Google Sheets™
Clean email lists, validate DNS MX records, and filter disposable domains in bulk directly inside Google Sheets. Safeguard domain sender reputation before launching cold outbound or newsletter campaigns.
| Email Address | Status | MX Host Verified | Disposable Filter | Syntax RFC |
|---|---|---|---|---|
| [email protected] | VALID ✓ | aspmx.l.google.com | Clean ✓ | RFC 5322 OK |
| [email protected] | DISPOSABLE ⚠️ | mx.tempinbox.io | Burner Domain ✕ | RFC 5322 OK |
| [email protected] | INVALID ✕ | No MX Records Found | Clean ✓ | DNS Failure |
| [email protected] | VALID ✓ | mail.protection.outlook.com | Clean ✓ | RFC 5322 OK |
| [email protected] | ROLE-BASED ℹ️ | mx1.enterprise-inc.com | Clean ✓ | Dept Mailbox |
Deep Deliverability Defense inside Google Sheets
Built for revenue operations leads, outbound growth teams, and email marketers who demand high inbox delivery without paying SaaS credit subscriptions.
Live DNS MX Validation
Directly queries authoritative DNS name servers to confirm that the recipient domain has operational mail exchange servers configured.
Disposable & Burner Inbox Filter
Identifies temporary mail services (GuerrillaMail, TempMail, Mailinator) to eliminate fake form leads and unengaged trial signups.
RFC 5322 Syntax & Typo Hygiene
Detects malformed email strings, missing top-level domains, rogue whitespace characters, and common typos like @gmai.com or @hotmial.com.
Domain Sender Reputation Shield
Keeping bounce rates below 2% protects your Google Workspace and Microsoft 365 domain from spam filters and blacklists.
Role-Based Account Detection
Flags departmental mailboxes such as sales@, info@, support@, and admin@ so you can segment decision-maker contacts effectively.
Zero Subscription or API Costs
Execute bulk verifications natively in your sheet without connecting third-party credit subscriptions or leaking proprietary contact lists.
Clean Your Outbound List in 3 Steps
Simple setup directly from Google Workspace Marketplace with zero developer configuration.
Install from Marketplace
Add Free Email Verifier to your Google Workspace account with standard single-click Google permissions.
Select Your Email Column
Highlight the column containing your prospective email contacts in any new or existing Google Spreadsheet.
Run Verification Engine
Click Extensions > Email Verifier > Verify List. Status, MX host, and disposable filters populate in adjacent columns.
How Email Verifier Compares to Paid Services
Stop paying recurring fees to verify leads when you can audit deliverability inside your existing workspace.
| Evaluation Feature | Email Verifier (DesignScript) | NeverBounce / ZeroBounce | Hunter.io |
|---|---|---|---|
| Cost per Verification | 100% Free Forever ($0) | $0.008 to $0.003 per verification | $49 to $399 / month plans |
| Environment | Native Google Sheets Workspace | Export CSV > Upload to Web Portal | Web Dashboard & API Keys |
| Data Security | Data Stays in Your Google Drive | Uploaded to External SaaS Servers | Uploaded to External SaaS Servers |
| Disposable Mailbox Filtering | Built-in Domain Blacklist | Included in Paid Tiers | Included in Paid Tiers |
| Team Sharing | Instant Google Drive Sharing | Requires Shared SaaS Logins | Seat-Based Pricing |
Frequently Asked Questions
Everything you need to know about technical capabilities, quotas, and security.
How does Email Verifier validate deliverability without sending emails?
The tool performs deep DNS MX record lookups to verify that the destination domain has active, configured mail servers ready to receive incoming email, combined with RFC 5322 syntax evaluation and disposable mailbox filtering.
Does this tool require external credits or API keys?
No. The verification algorithm runs natively using Google Apps Script DNS resolution engines. You do not need to register for third-party API keys or purchase verification credits.
Does it detect temporary and disposable email addresses?
Yes. It cross-references an integrated database of thousands of burner and temporary email domains (such as TempMail, GuerrillaMail, 10MinuteMail) to block fake signups.
Will this help protect my domain reputation?
Yes. Removing undeliverable addresses and invalid MX domains before launching cold email sequences keeps hard bounce rates below 2%, protecting Google Workspace and Microsoft 365 domain deliverability.
Is my prospect data kept private?
Yes. Your email contacts never leave your Google account. All checks occur inside your personal Google Workspace session with zero storage on third-party servers.