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cURL

cURL is the fastest way to verify authentication, request shape, DNS setup, and error handling before you wire a full application client.

curl https://transmission.mailtarget.co/v1/layang/transmissions \
  -X POST \
  -H "Authorization: Bearer $MAILTARGET_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "subject": "Hello from Mailtarget",
    "from": { "email": "you@your-verified-domain.com", "name": "Your Name" },
    "to": [{ "email": "recipient@example.com" }],
    "bodyText": "If you can read this, the integration works."
  }'

Expected success response:

{ "transmissionId": "abc123" }

For the full send body, read Transmission API.