Syntax and domain checks
Catch malformed addresses and domains that are not configured to receive mail before they contaminate a campaign.
Google Sheets Add-on
VerifyEmail App
Verify and validate email addresses directly inside Google Sheets so list cleanup happens where your team already works, not in a separate upload-and-download tool.
- Sheet-native workflowNo CSV export or re-import step.
- Multi-layer checksSyntax, domain, mailbox, disposable, and catch-all checks.
- Used by 800+ customersBuilt for recurring list hygiene and deliverability work.
Email lists decay continuously. Invalid, abandoned, disposable, and mistyped addresses increase bounce rates and weaken sender reputation. VerifyEmail App gives teams a practical way to clean data inside the spreadsheet where those lists already live.
Why teams use it
Most verification tools force a CSV export, an upload to another dashboard, and a manual import of results. VerifyEmail App removes that friction by writing verification outcomes directly next to the source data in Google Sheets.
What the verification covers
Mailbox validation
Identify addresses where the domain exists but the specific mailbox is not deliverable.
Disposable and risky addresses
Flag throwaway inboxes and other patterns that reduce long-term engagement quality.
Catch-all awareness
Separate clearly valid inboxes from domains that accept mail broadly so teams can make smarter sending decisions.
How it works in Sheets
Install the add-on
Add VerifyEmail App from Google Workspace Marketplace and open it inside the target spreadsheet.
Select the email column
Highlight the cells containing addresses you want to validate, from a short prospect list to a much larger working sheet.
Run verification
The add-on processes each address and writes status results into adjacent cells without requiring a separate export workflow.
Filter and act on results
Use Sheets filters, formulas, or conditional formatting to remove bad addresses and segment the list.
Who uses VerifyEmail App
Email marketing
Clean subscriber lists before campaigns so bounces do not drag down future inbox placement.
Sales outreach
Verify prospect data before sending outbound sequences that can damage domain reputation when lists are stale.
Recruiting
Validate event and applicant lists before time-sensitive communication needs to reach the right person.
E-commerce and operations
Improve delivery of transactional and lifecycle email by reducing invalid addresses at the data source.
Frequently asked questions
How accurate is it?
No verification system can guarantee certainty for every mail server, but a multi-layer approach catches the large majority of invalid addresses before you send.
Does it work with Google Workspace accounts?
Yes. Both personal Gmail and Workspace users can use it, subject to any admin approval rules in managed environments.
Does Swiftools store the email list?
No. The verification process is designed around real-time processing rather than turning your spreadsheet into a stored external dataset.
Can it identify catch-all domains?
Yes. Catch-all results are surfaced so you can treat those addresses differently from clearly valid inboxes.
Clean the list before it hurts deliverability
Install VerifyEmail App and run verification directly in Google Sheets without exporting your data to another tool.
Get VerifyEmail App