Many lists start life in Google Sheets before they ever reach an ESP or CRM.
That is fine, but it also means list cleanup often gets delayed because the data feels informal. The simplest fix is to treat the spreadsheet like any other CSV workflow.
The easiest method
- Download the sheet as a CSV
- Upload it to Verify List
- Review the results
- Export the cleaned version
- Reimport it into Sheets or your sending tool
That is usually easier than trying to force validation logic into the spreadsheet itself.
Why this works well
MailCull does not need a perfectly formatted email-only sheet.
If your file has:
- names
- notes
- phone numbers
- company columns
- other metadata
that is still fine. The point is to review the email addresses without rebuilding the document first.
What you can catch before reimport
This workflow helps you surface:
- malformed addresses
- typo domains
- disposable providers
- domains that do not appear configured for mail
That makes the next version of the sheet more trustworthy before it gets used for outreach, imports, or campaign work.
When this matters most
This is especially useful when:
- a teammate hands you a contact spreadsheet
- multiple lists were merged into one sheet
- you are preparing a CSV for upload elsewhere
- the file has been sitting around for a while and nobody trusts it fully