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Email List Validation & Cleaning

Email list validation & cleaning maximizes the efficiency of your email marketing campaigns and protects your email sender reputation.

With our Bulk Email Validation service, cleaning an email list is very easy: just upload your email list here - the first 1,000 email address validations are FREE! You no longer have to check your emails one by one, so if you run an email marketing agency, call center or lead generator, our Bulk Email Verifier tool is exactly what you need to get high quality leads.

Start Your Free Trial Now!

Upload Your Email List

Bulk Email Verification: How To Check If Your Email List Is Valid

Upload your email list as plain text (.txt) or as comma-separated values (CSV) file - one email address per line, CSVs with 'Email' as column header.

Do you have a customer account already? Please login here.

Register for Your Free Email Validation Account!

You will automatically receive 1000 free validation credits for your new account.
Your First Name (*)

Your Last Name (*)

Your Business Email (*)

We will send an email to this address with the account details, and this email address will also be used for any future communication, such as status notifications or download links for your validation results. Please note that we do not accept free email addresses like Gmail or Yahoo for the registration.

Validation Task Details

Task Name (*)

Choose a unique name that allows you to identify this task.

Validation Level (*)

Email lists with more than 100,000 addresses will always be processed in Full Check mode.

Email List File (*)

You can upload a text or CSV file (one email address per line, CSVs with 'Email' as column header).
Excel files must be exported to CSV first:

  • Open the file in Excel.
  • Click Menu | Save As (Other Formats).
  • Enter a name for the file and choose "Unicode Text (*.txt)".
  • Click Save.
The free trial is limited to 1000 email addresses.


Email List Validation Process

Our Email List Validation process includes all of the following checks:
  • Syntax verification (IETF/RFC standard conformance)
  • DNS validation, including MX record lookup
  • Disposable email address (DEA) detection
  • SMTP connection and availability checking
  • Temporary unavailability detection
  • Mailbox existence checking
  • Catch-All testing
  • Greylisting detection
  • Automatic retries for greylisted addresses
  • Automatic retries for unavailable servers
  • Automatic duplicate removal

We guarantee that during the entire verification process at no time will an email be sent to the respective recipient address.

Detailed Email List Validation Status

As soon as the validation process is finished, we send you an email and you can download the results. You may choose to download valid and invalid addresses as separate files. To match a result to a record in your database, you can merge the results with your input data when downloading the results. For each email address, we provide a detailed email validation status that shows you exactly the reasons why an email address is valid or not, so that you can fully understand the results and take appropriate action.

Email List Validation FAQ

How do I validate email addresses from a database, Customer Relationship Management (CRM) system or Excel?

Databases, CRM systems and Excel are capable to export data to CSV (comma-separated values) files - please see the answer to the next question for instructions on how to upload a CSV file for validation.

How do I validate email addresses from Excel or a CSV file?

You can start the validation process by uploading a CSV file (one email address per line, detailed instructions for Excel users) with a maximum size of 250MB (split larger lists into multiple files).
Excel files must be exported to CSV first:

  • Open the file in Excel.
  • Click Menu | Save As (Other Formats).
  • Enter a name for the file and choose "Unicode Text (*.txt)".
  • Click Save.

Why does my validation task not start automatically, even though I paid the correct amount?

We use a third-party service (MyCommerce Share-It / Digital River) to manage payments. Please use the same email address both for your validation task and for the Share-It purchase, so that the task to start can be identified. If you already used a different email address, please send us an email so we can start your task manually.

Why does the list upload web form report thousands of addresses, when I only uploaded a few hundred?

Our automatic format detection tries to detect and convert files submitted in many common spreadsheet and archive formats, but this sometimes fails. If this happens, make sure you submit your list in one of the following formats:

If you have a spreadsheet, use your spreadsheet software to export the list to text/csv format.
You can check your list with our Email List Validator tool before uploading.