The Scenario
You are an email operations manager. A new import list came in: 3,000 email addresses from a partner database, ready to be added to your Mailcoach list for an upcoming campaign.
Before you run the import, you need to check them against your suppression list. Mailcoach maintains a suppression list of hard bounces and spam complaints. If you import suppressed addresses and they get sent to, you damage your deliverability score. Some of those addresses bounced hard from a previous campaign eighteen months ago.
The bad version:
- Export the suppression list from Mailcoach as a CSV
- Open it alongside the import list in Sheets
- Write a VLOOKUP or MATCH formula to cross-reference the 3,000 rows
- Fix the formula when it breaks on emails with trailing spaces
- Mark the suppressed rows manually
- Hand the cleaned list off to whoever is running the import
- Three days later, someone imports the wrong version of the file.
The fast version is one prompt.
The Easy Way: One Prompt in SheetXAI
SheetXAI is an AI agent inside your spreadsheet that can fetch your Mailcoach suppression list and cross-reference it against your import sheet in one operation.
Open the SheetXAI sidebar and type:
Pull all Mailcoach suppressions into the 'Suppressions' sheet, then in the 'Import' sheet mark column C as SUPPRESSED for any email that appears in the suppression list and CLEAR for the rest.
SheetXAI fetches every suppression entry from Mailcoach, writes them into the Suppressions sheet, and then checks every row in the Import sheet against that list. Column C tells you exactly which rows to skip.
What You Get
Two updated sheets:
- Suppressions sheet — every suppressed email from Mailcoach, with suppression reason
- Import sheet, column C — SUPPRESSED or CLEAR for every row in your 3,000-row list
You can filter column C to SUPPRESSED and remove those rows before running the import. No formula, no manual cross-reference, no version confusion.
If you want, you can ask SheetXAI to delete the SUPPRESSED rows from the Import sheet entirely, so what remains is ready to send directly to the Mailcoach import API.
What If the Data Is Not Quite Ready
Suppression cross-checks are often messier than they look. SheetXAI handles the edge cases inline.
When the suppression list is large and you want a summary first
You want to know how many of your 3,000 addresses are suppressed before you act on it.
Fetch all Mailcoach suppressions. Check each email in column A of the 'Import' sheet against the suppression list. Write SUPPRESSED or CLEAR into column C. Then below the table, write a summary row showing how many were SUPPRESSED and how many were CLEAR.
When you want to split the import file based on the check
Instead of just flagging, you want two separate ready-to-use sheets.
Fetch all Mailcoach suppressions. Check column A of the 'Import' sheet against the suppression list. Move CLEAR rows into a new sheet called 'Safe to Import' and SUPPRESSED rows into a sheet called 'Blocked.' Leave the original sheet intact.
When the emails have inconsistent formatting
The partner database delivered emails in mixed case. The suppression list uses lowercase. A direct match will miss them.
Fetch all Mailcoach suppressions. Normalize all email addresses in both the suppression list and column A of the 'Import' sheet to lowercase before comparing. Write SUPPRESSED or CLEAR into column C.
When you want to run the clean import immediately after the check
You want to skip the intermediate step and go straight from cross-check to import.
Fetch all Mailcoach suppressions. Check column A of the 'Import' sheet against the list. Write SUPPRESSED or CLEAR into column C. Then take all CLEAR rows and run a Mailcoach CSV import into list UUID in cell G1 — write QUEUED or ERROR into column D for each imported row.
The pattern: the suppression check and the import happen in one prompt. No file to hand off, no version to track.
Try It
Get the 7-day free trial of SheetXAI and run a suppression cross-check before your next Mailcoach import. The Mailcoach integration is included in every SheetXAI plan. For related workflows, see how to bulk import subscribers into Mailcoach from a sheet or the Mailcoach in Google Sheets overview.