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Documentation Index

Fetch the complete documentation index at: https://docs.less.tech/llms.txt

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The Resend destination sends transactional emails using the Resend API. All recipient and content information comes from your incoming data. You can send one email per row or one email per group when using Group By.
You need a Resend API key from resend.com/api-keys. Make sure to verify your sending domain in Resend so emails can be delivered.

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Setup

1

Credentials

Create a Resend destination and complete the Credentials step:
  • Resend API key (required): Your API key from Resend (starts with re_).
  • From email: Sender address for outgoing emails. Must be from a verified domain in Resend. Defaults to noreply@less.tech if empty.
  • From name: Display name for the sender.

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Using the Destination tool

On the canvas, add a Destination tool and select your Resend destination. Configure:
  • Group by (optional): When set, one email is sent per unique combination of the selected columns. Leave empty for one email per row.
  • Recipient email column: The column in your data that contains the recipient email address.
  • Subject: Email subject line. Use [ColumnName] to insert values (only group-by columns when grouping is active). Type [ to see autocomplete suggestions.
  • Email body: Rich text editor with formatting. Type [ to autocomplete column names. Use [DATA_TABLE] where you want the inline data table to appear.
  • Attach dataset as: None, CSV, or Excel. When Group by is set, each email gets its group’s data as the attachment.
For one email per row, leave Group by empty — all columns can be used as placeholders. For one email per group (e.g. per region or per customer), select the columns to group by — only those columns are available as placeholders.