Bulk Email Verification

EmailVerify.io provides a bulk email verification tool that allows you to upload and verify large email lists in one go. If you are cleaning an existing database or validating a newly collected list, the tool processes your file automatically and appends the verification results directly to each row, keeping your original data intact.

Supported File Formats

EmailVerify.io accepts email lists in the following file formats:

• CSV: Comma Separated Value files (.csv)
• Excel: Microsoft Excel files (.xls, .xlsx)
• Text: Plain text files (.txt)

File Requirements

Before uploading your list, make sure your file meets the following requirements to ensure accurate processing:

• Each row should contain one email address
• The first row must include a column header named "Email."
• Email addresses must appear in the same column throughout the file
• Maximum file size: 25MB with up to 5,000 addresses

Your list can include additional columns such as names or physical addresses. EmailVerify.io will preserve all existing data and append the verification results to each row.

Example: List before verification showing multiple columns

Example: List after verification with results appended to each row

Upload Process

Below is a complete walkthrough of the upload process, from selecting your file to initiating verification:

Starting the Upload

To begin, log in to your EmailVerify.io account, navigate to the Email Verification section, and select Bulk Verification. Click Browse File to select your email list from your local storage.

You can also import files directly from:

• Dropbox
• Google Drive
• Microsoft OneDrive

Column Mapping

Once your file is selected, the system will display a column mapping interface. This step ensures EmailVerify.io identifies the correct column containing your email addresses.

Here you can:

• Select the appropriate column containing email addresses.
• Choose if you want to enable duplicate removal; this is recommended to save verification credits.

Processing Options

After confirming your column selection, you will be presented with two processing options.

Choose the one that best fits your workflow:

• Verify: Begin immediate processing of your email list.
• Schedule: Schedule your verification for a later date and time. This is ideal for large lists or when planning verification around campaign schedules.

File Processing

Once processing begins, your list will appear in the Result section.

The system will automatically:

• Validate the file format and structure
• Check your available verification credits
• Begin the verification process

You can monitor the progress from your Result table at any time. A notification will be sent when verification is complete.

Best Practices

Following these guidelines will help you get the most accurate results and manage your credits efficiently.

• Enable duplicate removal to optimize credit usage and avoid verifying the same address twice.
• Verify your lists regularly, every 30 to 60 days, to maintain list hygiene.
• Keep a backup of your original file before uploading for verification.
• Use scheduled processing for large lists during off-peak hours to avoid delays.

Need to Verify a Small Batch Instead? 

Our Instant Verification tool is built for quick, on-demand checks of up to 25 addresses at a time.