The Scenario
You've been managing demand gen for the past quarter and you have 20,000 new leads sitting in a Google Sheet — collected from paid ads, a content download, and a partner co-marketing push. Before any of them go into Salesforce, your ops team wants them validated. Not a sample. All of them.
The bad version:
- Break the list into batches of 1,000 because the dashboard has an upload cap, then submit each batch separately and track which job ID belongs to which slice
- Poll the Mails.so dashboard every 20 minutes waiting for each batch to complete, download the result files as they finish, and reassemble them in the right order
- Import the consolidated results file and use INDEX-MATCH to merge statuses back into the original sheet before handing it off to ops
Twenty thousand rows is not a one-afternoon job when you're doing it manually. And ops is waiting on this before they run the Salesforce import — which is already a day behind because you were waiting on the list to be ready in the first place.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent that lives inside your Google Sheet. It reads the full list, submits it to Mails.so as a bulk validation batch through the built-in integration, and writes the results back once the job completes — without you managing job IDs, polling, or reassembly.
Submit all emails in column B as a bulk validation batch to Mails.so and when the job completes write the validation status for each email into column C.
What You Get
- SheetXAI submits the full email column as a bulk batch to the Mails.so API
- Column C fills with the validation status for each row once the job finishes:
valid,invalid, orrisky - Rows where the batch result has no match are written with
no resultso gaps are visible - The row order in your sheet is preserved — results write back to the originating row
What If the Data Is Not Quite Ready
The email column has duplicates and you don't want to pay to validate the same address twice
Deduplicate the emails in column B before submitting the bulk validation batch to Mails.so. Write the validation result into column C for every row, reusing the result for any duplicate addresses.
Some rows are missing an email address entirely
Submit all non-empty emails in column B as a bulk validation batch to Mails.so. Write the result into column C for each row that had an email. Write "no email" in column C for any row where column B was blank.
You need to write REMOVE in column D for any email that comes back invalid
Bulk-validate the email list in column B with Mails.so, retrieve the batch results, and write REMOVE in column D for any email that comes back invalid. Leave column D blank for valid or risky addresses.
Validate, flag for removal, and write the failure reason in one pass
Bulk-validate all emails in column B with Mails.so. Write the status into column C, write REMOVE in column D for invalid addresses, and write the specific failure reason into column E for any address that is invalid or risky. Leave columns D and E blank for valid addresses.
One prompt does the validation, the suppression flag, and the failure annotation without chaining separate steps.
Try It
Get the 7-day free trial of SheetXAI and open your lead list sheet, then ask it to submit the email column as a bulk batch and write the results back. See also how to validate emails before a campaign or review the full Mails.so integration overview.