Bulk Email Validator

Validate up to 20 email addresses at once. Instantly check format, domain validity, and MX record availability.

MX record verification Bulk validation CSV & text export

Enter Email Addresses

Enter up to 20 email addresses — one per line

Processing...

Validation Results

New List

Paste EmailsEnter up to 20 emails, one per line

ValidateFormat, domain, and MX records are checked

View ResultsSee valid and invalid status for each email

ExportDownload results as CSV or plain text

Secure by designYour email list is processed instantly over an encrypted connection and never stored on our servers.

Encrypted in transitSubmitted over HTTPS/TLS — nothing is sent in plain text.

Never storedThe email addresses you check are not saved to any database or log.

No third-party sharingYour list is never shared with ads, trackers, or outside services.

Processed instantlyChecked on request and discarded immediately after the response.

About Bulk Email Validator

What Is a Bulk Email Validator?

This tool checks a list of email addresses for validity — correct format, real domain, and deliverability signals — helping clean a list before sending a campaign, since sending to invalid addresses hurts sender reputation and deliverability.

How to Use This Tool

Paste or upload your list of email addresses
Click Validate
Review which addresses are valid, risky, or invalid
Remove invalid addresses before sending

Key Features

Bulk validation — check an entire list at once
Clear per-address status

Who Uses This Tool

Email marketers cleaning a list before a campaign to protect sender reputation. Businesses validating collected leads before adding them to a mailing list.

Frequently Asked Questions

Why does list quality matter for email marketing?
Sending to many invalid addresses triggers bounces and spam complaints, which can damage your domain's sender reputation and hurt deliverability for future campaigns.

Is this tool free?
Yes, validating email addresses is completely free.

Frequently Asked Questions

What does "valid" mean for an email?

A valid result means the email address passes format validation (correct structure with @ and domain) and the domain has a valid MX record (mail exchange), meaning it is set up to receive email. It does not guarantee the mailbox exists.

Can this detect disposable/temporary emails?

The tool checks format and MX records. Disposable email detection requires a separate database lookup. If you need to block temp addresses, consider using an API that maintains a blocklist of known disposable providers.

How many emails can I validate at once?

You can validate up to 20 email addresses per request. For larger lists, split them into batches and run multiple validations.

Why might a valid email show as invalid?

An email may show as invalid if the domain has no MX record (unlikely to receive email), if DNS lookup fails temporarily, or if the format is non-standard. Some corporate domains use unusual setups that may cause false negatives.