Bulk Verify an Email List From an Excel workbook With EmailListVerify

The Scenario

You're an email marketing manager at a B2C retailer. You've got an Excel workbook with roughly 50,000 customer emails — a mix of purchase signups, contest entries, and imported contacts from two years of list swaps. The promotional campaign going out Thursday is your biggest send of the quarter.

Your deliverability consultant told you last month that your bounce rate from the previous campaign was 4.2%. That number is circling in your head.

The bad version:

• Export the workbook's email column as a CSV, upload it to EmailListVerify's dashboard, wait for the bulk job to finish (somewhere between 20 minutes and a few hours for a list this size)
• Download the results file, open it in a second workbook, try to align the "email" column in the results with the original workbook's row order — which hasn't stayed sorted since someone added 800 new contacts last week
• Paste verification statuses back row by row, discover three columns are misaligned, redo the paste, repeat

Fifty thousand addresses means no one is doing this by hand and getting it right the first time. And you have a campaign to finalize, not an afternoon to spend on data plumbing.

The Easy Way: One Prompt in SheetXAI

SheetXAI is an AI agent that lives inside your Excel workbook. It reads your data, connects to EmailListVerify, submits the list as a bulk verification job, polls until the job finishes, and writes every result back to the right row — all from a single prompt.

Take all emails in column A of my "Customer List" worksheet, submit them to EmailListVerify as a bulk upload, poll until the job finishes, download the results, and write the status (valid/invalid/catch-all/unknown) back to column B

What You Get

• Column B fills with a status for every row: valid, invalid, catch-all, or unknown
• Rows stay aligned to the original email column — no realignment step
• If a row had a blank email cell, SheetXAI flags it rather than sending an empty string to the API
• When the job is still processing, SheetXAI waits and checks back rather than returning a partial result

What If the Data Is Not Quite Ready

The list has duplicates and you want to verify only unique addresses

Deduplicate the emails in column A of the "Customer List" worksheet, submit only the unique addresses to EmailListVerify for bulk verification, then write the status back to column B for every row — including duplicate rows that matched a verified address

Some emails have leading or trailing spaces from a CSV import

Trim whitespace from every email in column A of the "Customer List" worksheet before submitting them to EmailListVerify for bulk verification, then write the cleaned email back to column A and the verification status to column B

The list is split across three worksheets and you need a unified result

Combine all email addresses from the "Purchases," "Contests," and "Imports" worksheets into a single pass through EmailListVerify's bulk verification, then write each result back to a "Status" column in the worksheet where the address originally appeared

Clean the list and separate the valid addresses in one shot

Verify all emails in column A of the "Customer List" worksheet using EmailListVerify, write the status to column B, then copy all rows where status is "valid" to a new worksheet called "Verified Sends" so I have a clean list ready to export

Ask for the verification and the filtering in one prompt — SheetXAI handles both without a second pass.

Try It

Get the 7-day free trial of SheetXAI and open your campaign workbook, then ask SheetXAI to run a bulk verification pass against EmailListVerify and write the statuses back before your next send. See also: enriching emails with detailed metadata and the EmailListVerify hub.