curl --request POST \
  --url https://api.paubox.net/v1/orca/{username}/campaign_mailing_sends \
  --header 'Content-Type: application/json' \
  --header 'authorization: <api-key>' \
  --data '
{
  "campaign_mailing_id": "g79da293-4a84-4b50-b0d9-76a16af167fe",
  "campaign_mailing_send": {
    "sender_email": "marketing@yourdomain.com",
    "subscription_list_id": "1a55ec71-0b08-457a-b183-51ac7791f1fe",
    "recipient_emails": [
      "test1@example.com",
      "test2@example.com"
    ],
    "customer_name": "Your Company",
    "from_email": "no-reply@yourdomain.com",
    "from_name": "Your Company Name",
    "subject": "Your Campaign Subject"
  }
}
'

{}