The Scenario
You are a compliance manager. A third-party form processed 60 unsubscribe requests over the last two weeks. The emails are in a Google Sheet, column A. The next broadcast goes out Monday. Every one of those contacts needs to be marked as unsubscribed in Resend before the send.
This is not optional. If you send to unsubscribed contacts, you are looking at CAN-SPAM violations, abuse reports, and a deliverability penalty that takes months to repair.
The bad version:
- You send the list to the developer and ask her to write a script
- She is in the middle of a sprint and gets to it Friday afternoon
- The script runs, logs a success count, but the success count is 57 out of 60 and nobody knows which three failed
- You send Monday's broadcast without knowing three people on your list should not have received it.
The fast version is one prompt with a result logged per row.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent inside your Google Sheet that reads the unsubscribe list and updates each contact in Resend for you.
Open the SheetXAI sidebar and type:
For each email in column A of the Unsubscribes sheet, update that Resend contact's 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 Unsubscribes sheet 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 and the broadcast goes out clean.
No "success count of 57" with no context. Row-level logging means row-level accountability.
What If the Data Is Not Quite Ready
Unsubscribe lists collected via third-party forms are rarely clean. SheetXAI handles the issues and the updates in the same prompt.
When the sheet has duplicate email addresses
Some contacts submitted the form twice and appear twice in column A.
Deduplicate column A of the Unsubscribes sheet, 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 rows have emails that are not registered Resend contacts
Some opt-out emails may have never been in your Resend audience. You do not want the script to error on those.
For each email in column A of Unsubscribes, try to update the Resend contact subscription status to unsubscribed. If the contact does not exist in Resend, 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 run. You only want to process the blank rows.
For each row in the Unsubscribes sheet where column B is blank, update that 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 list has duplicates, non-contacts, and previously processed rows all mixed together
The sheet is a cumulative export from the form and nobody has cleaned it.
Look at the Unsubscribes sheet. Skip rows where column B already has a value. Deduplicate the remaining rows by column A, keeping the first occurrence. 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 together in one prompt. Monday's broadcast goes out clean.
Try It
Get the 7-day free trial of SheetXAI and open any sheet 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 or the Resend in Google Sheets overview.