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Template Emails

Use template sends when Mailtarget stores the message layout and your application supplies data.

curl https://transmission.mailtarget.co/v1/layang/transmissions \
  -X POST \
  -H "Authorization: Bearer $MAILTARGET_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "subject": "Receipt for order #{{order_id}}",
    "templateId": "tmpl_receipt_v3",
    "from": { "email": "billing@your-verified-domain.com", "name": "Your Company" },
    "to": [{ "email": "recipient@example.com" }],
    "substitutionData": {
      "order_id": "10042",
      "amount": "250000"
    },
    "metadata": {
      "order_id": "10042"
    }
  }'

Keep template variables stable. A missing variable can produce broken copy or a validation error, depending on template configuration.