The Scenario
You are a compliance manager. A third-party form collected 60 unsubscribe requests over the past two weeks. The emails are in an Excel workbook on SharePoint, column A. The next broadcast goes out Monday. Every one of those contacts needs to be marked as unsubscribed in Resend before it sends.
This is not a nice-to-have. Sending to unsubscribed contacts means CAN-SPAM exposure, abuse complaints, and a deliverability hole that takes months to climb out of.
The bad version:
- You send the list to the developer and ask her to write a removal script
- She is mid-sprint and gets to it Friday afternoon
- The script runs against a CSV export, not the live workbook, because it could not authenticate to SharePoint
- It finishes with a "57 updated" message and nobody knows which three failed
- Monday's broadcast goes out without knowing three people on the list should not have received it.
The fast version is one prompt from the workbook, with a logged result per row.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent inside your Excel workbook that reads the unsubscribe list and updates each contact in Resend for you.
Open the SheetXAI sidebar and type:
Read column A of the OptOutList tab in this workbook and update each contact's Resend subscription status to unsubscribed. Write "updated" or the error message into column B for each row.
SheetXAI iterates through all 60 rows, updates each contact's subscription status in Resend, and logs the result in column B. Sixty rows, sixty results, "updated" or the exact error per row.
What You Get
A completed OptOutList tab with a result for every row:
- Column A — email addresses, untouched
- Column B — "updated" or the Resend error message for each contact
You know exactly which three failed, if any, because column B tells you. You fix those three before Monday. The broadcast goes out clean.
No "57 of 60 success" with no context. Row-level logging means row-level accountability.
What If the Data Is Not Quite Ready
Unsubscribe lists from third-party forms are rarely clean. SheetXAI handles the issues and the updates in the same prompt.
When the workbook has duplicate email addresses
Some contacts submitted the form twice and appear twice in column A.
Deduplicate column A of the OptOutList tab, keeping the first occurrence of each email. Then update each unique contact's Resend subscription status to unsubscribed and log the result in column B.
When some emails are not registered Resend contacts
Some opt-out emails may have never been in your audience.
For each email in column A of OptOutList, try to update the Resend contact subscription status to unsubscribed. If the contact does not exist, write "not found" in column B. If the update succeeds, write "updated." If it fails for another reason, write the error.
When you want to process only the new unsubscribes since the last run
Column B already has "updated" in some rows from a previous partial run.
For each row in the OptOutList tab where column B is blank, update the contact's Resend subscription status to unsubscribed and write "updated" or the error into column B. Skip rows that already have a value in column B.
When the workbook has duplicates, non-contacts, and previously processed rows mixed together
The workbook is a cumulative export from the form and was never cleaned.
Look at the OptOutList tab. Skip rows where column B already has a value. Deduplicate the remaining rows by column A. For each unique unprocessed email, update the Resend contact's subscription status to unsubscribed. Write "updated," "not found," or the error into column B.
The pattern: the dedup, the existence check, and the update happen in one prompt. Monday's broadcast goes out clean.
Try It
Get the 7-day free trial of SheetXAI and open any workbook with unsubscribe emails, then ask it to update the Resend contacts. The Resend integration is included in every SheetXAI plan. See also how to bulk-remove contacts from segments in Excel or the Resend in Excel overview.