The Scenario
A new batch of opt-out requests landed this morning. One hundred and twenty emails, collected from a web form, a customer service inbox, and a third-party data partner. Your compliance manager needs all of them suppressed in Klaviyo before tomorrow's campaign send. The batch is in an Excel workbook: one email per row in column A.
The bad version:
- Log into Klaviyo and navigate to the audience suppression import tool — find that it accepts a maximum of 100 emails per CSV file.
- Split the 120 emails into two files manually, upload the first batch, wait for it to process, then upload the second.
- Download the suppression confirmation report, cross-reference it against the workbook to confirm all 120 went through, and save the report somewhere for the audit trail.
Tomorrow's campaign goes out regardless. The compliance manager does not have bandwidth for two-file imports.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent that lives inside your Excel workbook. It reads the opt-out list and calls Klaviyo's bulk suppression endpoint — handling the batching limit automatically.
Suppress all email addresses in column A of this workbook in Klaviyo so they no longer receive marketing emails
What You Get
- All 120 emails are submitted in batches of 100, with SheetXAI splitting and sequencing automatically.
- A status column is written back into the workbook: "SUPPRESSED" or the error reason for any address that could not be processed.
- Klaviyo excludes suppressed addresses from all future sends immediately.
What If the Data Is Not Quite Ready
You need the HTTP status code logged for the audit report
Read the "Opt-Outs" worksheet column A and suppress each email in Klaviyo, logging the HTTP status code in column B for each row
The opt-out source needs to be recorded alongside the confirmation
Suppress all emails in column A from Klaviyo; column B has the opt-out source (web form, email reply, or partner); write the suppression status into column C and include the opt-out source in the confirmation log
Only new opt-outs should be processed — skip rows already marked done
Suppress only the emails in column A where column B is blank — skip rows where column B already says "SUPPRESSED" — and write the suppression status into column B for newly processed rows
Full compliance workflow in one pass
Read the "Opt-Outs" worksheet, deduplicate column A by email, suppress all unique emails in Klaviyo in batches, write "SUPPRESSED" or "FAILED" plus the error into column B, write today's date into column C for every successfully suppressed row, and output a summary showing total processed and total failed
The audit trail is in the workbook. Tomorrow's campaign goes out to a clean list.
Try It
Get the 7-day free trial of SheetXAI and open your compliance opt-out tracking workbook, then ask it to push all pending suppressions to Klaviyo in one operation. Also see how to remove contacts from a list for cases where list removal rather than full suppression is what the situation requires.