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Bulk Verify API now accepts an optional emailColumn field

You can now tell Deliverable which CSV column holds the emails. If you don’t send emailColumn, the API still looks for a column named Email.

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What’s changing

  • emailColumn is optional. Omit it and we look for a column named Email.
  • Send emailColumn if your header is something else, for example Work Email or email.
  • The file must have a real header row. A bare list of addresses with no header will be rejected.
  • emailColumn must be a column name, not an email address.

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Example request

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Valid file

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Rejected file (no header)

If the header is missing, the API returns:

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What you need to do

  1. Add a header row to every bulk CSV.
  2. If the column is named Email, you don’t need to change anything.
  3. If it isn’t, pass that header as emailColumn.
The website bulk upload is unchanged. Single email verification (POST /verify/single) is unchanged.