curl --request POST \
  --url https://api.ckpnd.com:5001/v1/email \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "to": [
    {
      "email": "recipient@exampledomain.com"
    }
  ],
  "options": {
    "cc": [
      {
        "email": "cc@exampledomain.com"
      }
    ],
    "bcc": [
      {
        "email": "bcc@exampledomain.com"
      }
    ]
  },
  "from": {
    "email": "sender@yourdomain.com",
    "name": "John Doe"
  },
  "replyTo": {
    "email": "sender@yourdomain.com",
    "name": "John Doe"
  },
  "subject": "Hello World",
  "body": "<h1>Hello World</h1>",
  "attachments": [
    {
      "filename": "file1.gif",
      "path": "https://i1.wp.com/cms.babbel.news/wp-content/uploads/2015/05/HEAD02_FRA-20150703094705.gif"
    },
    {
      "filename": "file2.jpg",
      "path": "http://2.bp.blogspot.com/-DIEPOOz9uqI/UHomvta-AcI/AAAAAAAAAdI/_Nv0WyIXxhA/s1600/P1010411.JPG"
    }
  ]
}
'

{
  "message": "Messages sent!",
  "to": [
    {
      "email": "recipient@exampledomain.com",
      "msgid": "40f7f020-4c0c-11e9-870a-51bee176686d"
    }
  ]
}