A SendGrid Alternative that offers

require 'uri'
require 'net/http'

url = URI("https://sgapi.pepipost.com/v3/mail/send")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_NONE

request = Net::HTTP::Post.new(url)
request["authorization"] = 'Bearer <>'
request["content-type"] = 'application/json'
request.body =
"{\"personalizations\":[{\"to\":[{\"email\":\"john.doe@example.com\",\"name\":\"John
Doe\"}],\"dynamic_template_data\":{\"verb\":\"\",\"adjective\":\"\",\"noun\":\"\",\"currentDayofWeek\":\"\"},\"subject\":\"Hello,
World!\"}],\"from\":{\"email\":\"noreply@johndoe.com\",\"name\":\"John
Doe\"},\"reply_to\":{\"email\":\"noreply@johndoe.com\",\"name\":\"John
Doe\"},\"template_id\":\"d-8096b5dacb254c8b882816f22d1d11fe\"}"

response = http.request(request)
puts response.read_body

"hostname": "https://sgapi.pepipost.com/v3/mail/send",
  "port": null,
  "path": "/v3/mail/send",
  "headers": {
    "authorization": "Bearer <>",
    "content-type": "application/json"
  }
};

var req = http.request(options, function (res) {
  var chunks = [];

  res.on("data", function (chunk) {
    chunks.push(chunk);
  });

  res.on("end", function () {
    var body = Buffer.concat(chunks);
    console.log(body.toString());
  });
});

req.write(JSON.stringify({ personalizations:
   [ { to: [ { email: 'john.doe@example.com', name: 'John Doe' } ],
       dynamic_template_data: { verb: '', adjective: '', noun: '',
currentDayofWeek: '' },
       subject: 'Hello, World!' } ],
  from: { email: 'noreply@johndoe.com', name: 'John Doe' },
  reply_to: { email: 'noreply@johndoe.com', name: 'John Doe' },
  template_id: 'd-8096b5dacb254c8b882816f22d1d11fe' }));
req.end();

import http.client

conn =
http.client.HTTPSConnection("https://sgapi.pepipost.com/v3/mail/send")

payload =
"{\"personalizations\":[{\"to\":[{\"email\":\"john.doe@example.com\",\"name\":\"John
Doe\"}],\"dynamic_template_data\":{\"verb\":\"\",\"adjective\":\"\",\"noun\":\"\",\"currentDayofWeek\":\"\"},\"subject\":\"Hello,
World!\"}],\"from\":{\"email\":\"noreply@johndoe.com\",\"name\":\"John
Doe\"},\"reply_to\":{\"email\":\"noreply@johndoe.com\",\"name\":\"John
Doe\"},\"template_id\":\"d-8096b5dacb254c8b882816f22d1d11fe\"}"

headers = {
    'authorization': "Bearer <>",
    'content-type': "application/json"
    }

conn.request("POST", "/v3/mail/send", payload, headers)

res = conn.getresponse()
data = res.read()

print(data.decode("utf-8"))

HttpResponse response =
Unirest.post("https://sgapi.pepipost.com/v3/mail/send")
  .header("authorization", "Bearer <>")
  .header("content-type", "application/json")

.body("{\"personalizations\":[{\"to\":[{\"email\":\"john.doe@example.com\",\"name\":\"John
Doe\"}],\"dynamic_template_data\":{\"verb\":\"\",\"adjective\":\"\",\"noun\":\"\",\"currentDayofWeek\":\"\"},\"subject\":\"Hello,
World!\"}],\"from\":{\"email\":\"noreply@johndoe.com\",\"name\":\"John
Doe\"},\"reply_to\":{\"email\":\"noreply@johndoe.com\",\"name\":\"John
Doe\"},\"template_id\":\"d-8096b5dacb254c8b882816f22d1d11fe\"}")
  .asString();

$curl = curl_init();

curl_setopt_array($curl, array(
  CURLOPT_URL => "https://sgapi.pepipost.com/v3/mail/send",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS =>
"{\"personalizations\":[{\"to\":[{\"email\":\"john.doe@example.com\",\"name\":\"John
Doe\"}],\"dynamic_template_data\":{\"verb\":\"\",\"adjective\":\"\",\"noun\":\"\",\"currentDayofWeek\":\"\"},\"subject\":\"Hello,
World!\"}],\"from\":{\"email\":\"noreply@johndoe.com\",\"name\":\"John
Doe\"},\"reply_to\":{\"email\":\"noreply@johndoe.com\",\"name\":\"John
Doe\"},\"template_id\":\"d-8096b5dacb254c8b882816f22d1d11fe\"}",
  CURLOPT_HTTPHEADER => array(
    "authorization: Bearer <>",
    "content-type: application/json"
  ),
));

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
    "fmt"
    "strings"
    "net/http"
    "io/ioutil"
)

func main() {

    url := "https://sgapi.pepipost.com/v3/mail/send"

    payload :=
strings.NewReader("{\"personalizations\":[{\"to\":[{\"email\":\"john.doe@example.com\",\"name\":\"John
Doe\"}],\"dynamic_template_data\":{\"verb\":\"\",\"adjective\":\"\",\"noun\":\"\",\"currentDayofWeek\":\"\"},\"subject\":\"Hello,
World!\"}],\"from\":{\"email\":\"noreply@johndoe.com\",\"name\":\"John
Doe\"},\"reply_to\":{\"email\":\"noreply@johndoe.com\",\"name\":\"John
Doe\"},\"template_id\":\"d-8096b5dacb254c8b882816f22d1d11fe\"}")

    req, _ := http.NewRequest("POST", url, payload)

    req.Header.Add("authorization", "Bearer <>")
    req.Header.Add("content-type", "application/json")

    res, _ := http.DefaultClient.Do(req)

    defer res.Body.Close()
    body, _ := ioutil.ReadAll(res.Body)

    fmt.Println(res)
    fmt.Println(string(body))

}