The Scenario
A growth marketer inherited a lead database with 9,000 email addresses spread across three columns — column A from paid ads, column B from a content download form, column C from a co-marketing partner. The addresses need to be verified before anything gets imported to the CRM. Listclean's bulk verify endpoint caps at 3,000 emails per batch. This is not something you figure out until you've already tried to upload all 9,000 at once and gotten an error.
The bad version:
- Manually split the 9,000 addresses into three CSV files of 3,000 each, which first requires collapsing all three columns into one, deduplicating, sorting, slicing into thirds, and exporting each slice separately.
- Upload the first file, wait for it to finish, download the results. Repeat for files two and three.
- Try to merge all three results files back together and re-match statuses to the original rows — which now means running a VLOOKUP across 9,000 rows across multiple workbooks, and hoping nothing got reordered during any of the uploads.
This is a two-hour project that exists entirely because Listclean has a batch size limit and the data lives in a workbook.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent inside your Excel workbook that reads your data and talks to Listclean's API. It handles batch segmentation, job submission, completion monitoring, and result reassembly — so you describe the outcome and it handles the logistics.
Take all emails from columns A, B, and C, split them into batches of 3,000, submit each batch to Listclean, and once all batches finish write every email and its verification status into a new worksheet called 'All Verified.'
SheetXAI consolidates the three columns, deduplicates if needed, splits into 3,000-address batches, submits each to Listclean sequentially, monitors completion for all batches, and assembles the full annotated list in the "All Verified" worksheet.
What You Get
- A single worksheet — "All Verified" — with every email from all three source columns and its corresponding Listclean status.
- Statuses matched to emails by value, not by row number, so batch reordering doesn't corrupt the results.
- All batch jobs tracked internally — you don't need to monitor each one manually.
- A summary row if you ask for it — total submitted, clean count, dirty count, unknown count.
What If the Data Is Not Quite Ready
One column has emails with name+email in the same cell (e.g., "Jane Doe jane@example.com")
Before verifying, extract just the email address from any cells in column B that contain a name and email in the format "Name <email>," then split all emails from columns A, B, and C into batches of 3,000 and verify with Listclean.
You want each batch tracked with its list ID in a separate log worksheet
Verify the 2,800 emails in column A using Listclean batch verification, wait for completion, then write the list ID, clean count, dirty count, and unknown count as a summary row in row 1 of a worksheet called 'Batch Log.'
You only want to verify columns that have more than 500 entries
Count the emails in columns A, B, and C separately. For any column with more than 500 entries, submit it as a batch to Listclean and write results into a worksheet named after the source column (e.g., 'Verified A,' 'Verified B').
Verify, deduplicate, segment, and import-ready output in one pass
Take all emails from columns A, B, and C, deduplicate them, split into 3,000-address batches, verify with Listclean, then write clean addresses into a worksheet called 'CRM Import Ready' and dirty/unknown into a worksheet called 'Suppressed' — with a count of each group in row 1 of both worksheets.
The pattern: batch segmentation, multi-job orchestration, and result reassembly in a single instruction — no manual CSV slicing, no download-and-merge cycle.
Try It
Get the 7-day free trial of SheetXAI and open any Excel workbook with a large multi-column email list, then ask it to handle the Listclean batch splitting and verification automatically. For related tasks, see exporting only the verified clean addresses or tracking upload job progress, or return to the Listclean integration overview.