The Scenario
You're wrapping up a newsletter migration. The old platform is being shut off Friday. You have 1,000 subscribers in an Excel workbook — email in column A, first name in column B, last name in column C, industry in column D — and they all need to land in a Sender group before anyone notices the old system is gone.
The bad version:
- Export the workbook to CSV, then realize the industry column header doesn't match the Sender custom field name, and spend 15 minutes figuring out which field slug to use in the import wizard.
- Start the import, watch it succeed for 800 rows, then find out 200 rows errored with no explanation — and now you're reconciling which emails didn't make it by scrolling through a downloaded error report.
- Do a second import pass for the failed rows, hope the deduplication logic works, and discover two days later that some subscribers got added twice with conflicting field values.
The subscribers need to be in Sender before Friday. This is not a nice-to-have cleanup job — the campaign going out Saturday morning depends on the list being whole.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent that lives inside your Excel workbook. It reads your subscriber data, understands the column layout, and through its built-in Sender integration it can upsert every row for you — custom fields included. No CSV, no import wizard, no field slug hunting.
Upsert every subscriber in this Excel table into Sender using email (column A), first name (column B), last name (column C), and the company custom field (column D), adding all to the group with ID [GROUP_ID].
SheetXAI processes each record, handles the create-or-update logic against the Sender API, maps the industry value to the correct custom field, and writes the per-row result into column E so you have a live audit trail of exactly what happened.
What You Get
- Column E fills with "done" for each successfully upserted subscriber.
- Rows that hit an error get the error message written into column E — email format invalid, custom field type mismatch, group ID not found — so you know exactly which ones to fix.
- Subscribers who already exist in Sender get their fields updated; new emails get created. The deduplication is handled by the API.
- The import is one-pass. You don't need to reconcile a downloaded error report.
What If the Data Is Not Quite Ready
The industry field has mixed capitalizations and blank cells
For each row in columns A through D, normalize the industry value in column D to title case and replace any blanks with "Unknown", then upsert each subscriber into Sender with group ID [GROUP_ID] and write the result into column E.
Some rows have a different group ID depending on the subscriber's industry
For each row in columns A through D, if column D is "SaaS" or "Fintech" use group ID [GROUP_1], otherwise use [GROUP_2], and upsert each subscriber into Sender, writing the group ID used and the result into columns E and F.
The subscriber data is split across three worksheets — one per region
Combine all subscriber rows from the US, EU, and APAC worksheets (columns A through D on each), deduplicate by email address, and upsert the full list into Sender group ID [GROUP_ID], writing the per-row result back to a new Results worksheet.
The import list needs cleaning, deduplication, and then the import — all in one pass
In the Subscribers worksheet, remove any rows where column A has no "@" sign, deduplicate by email keeping the most recent row, normalize column D to title case, then upsert each remaining row into Sender group ID [GROUP_ID] with email, first name, last name, and industry as the custom field — write the status into column E and a summary of how many rows were cleaned vs. imported into cell G1.
The general pattern: ask for the cleanup and the import in the same prompt. SheetXAI handles the conditional logic inline so you don't have to pre-process the workbook separately.
Try It
Get the 7-day free trial of SheetXAI and open the Excel workbook with your subscriber list, then ask it to upsert all rows into your Sender group before Friday's cutover. See also: Pull campaign performance stats and the Sender integration hub.