If your file is not uploading or the columns look wrong, one of these usually fixes it.
- Check the size — uploads can be up to 100 MB. If yours is bigger, split it into smaller files.
- Use a CSV — save your spreadsheet as a CSV file (in your spreadsheet program, choose Save As or Export, then CSV).
- Keep your headers in the first row — a clear title like "Email" helps us find the right column.
- If we picked the wrong column, set the columns by hand when you create the list (see "Match up your columns").
- Pasting instead? Put one email per line, or paste a CSV with a header row.
Tip
Still stuck? Try a small test file with just a few rows to confirm the format works, then scale up.
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If you still have a question, we are happy to help.