The email delivery service that people actually like

# Send an email with the Postmark Rails Gem
# Learn more -> https://postmarkapp.com/developer/integration/official-libraries#rails-gem
# Add this to your gemfile
gem 'postmark-rails'
# Add this to your config/application.rb file:
config.action_mailer.delivery_method = :postmark
config.action_mailer.postmark_settings = { :api_token => "POSTMARK_API_TEST" }
# Send the email
class TestMailer < ActionMailer::Base
  def hello
    mail(
      :subject => 'Hello from Postmark',
      :to  => 'receiver@example.com',
      :from => 'sender@example.com',
      :html_body => '<strong>Hello</strong> dear Postmark user.',
      :track_opens => 'true'
    )
  end
end

# Send an email with the Postmark Ruby Gem
# Learn more -> https://postmarkapp.com/developer/integration/official-libraries#ruby-gem
# Add the Postmark Ruby Gem to your Gemfile
gem 'postmark'
# Require gem
require 'postmark'
# Create an instance of Postmark::ApiClient
client = Postmark::ApiClient.new('POSTMARK_API_TEST')
# Example request
client.deliver(
  from: 'sender@example.com',
  to: 'receiver@example.com',
  subject: 'Hello from Postmark',
  html_body: '<strong>Hello</strong> dear Postmark user.',
  track_opens: true
)

// Send an email with the Postmark .NET library
// Learn more -> https://postmarkapp.com/developer/integration/official-libraries#dot-net
// Install with NuGet
PM> Install-Package Postmark
// Import
using PostmarkDotNet;
// Example request
PostmarkMessage message = new PostmarkMessage {
    From = "sender@example.com",
    To = "receiver@example.com",
    Subject = "Hello from Postmark",
    HtmlBody = "<strong>Hello</strong> dear Postmark user.",
    TextBody = "Hello dear postmark user.",
    ReplyTo = "reply@example.com",
    TrackOpens = true,
    Headers = new NameValueCollection {{ "CUSTOM-HEADER", "value" }}
};
PostmarkClient client = new PostmarkClient("POSTMARK_API_TEST");
PostmarkResponse response = client.SendMessage(message);
if(response.Status != PostmarkStatus.Success) {
    Console.WriteLine("Response was: " + response.Message);
}

// Send an email with the Postmark-PHP library
// Learn more -> https://postmarkapp.com/developer/integration/official-libraries#php
// Install with composer
composer require wildbit/postmark-php
// Import
use Postmark\PostmarkClient;
// Example request
$client = new PostmarkClient("server token");
$sendResult = $client->sendEmail(
  "sender@example.com",
  "receiver@example.com",
  "Hello from Postmark!",
  "This is just a friendly 'hello' from your friends at Postmark."
);

// Send an email with the Postmark.js library
// Learn more -> https://postmarkapp.com/developer/integration/official-libraries#node-js
// Install with npm
npm install postmark --save
// Require
var postmark = require("postmark");
// Example request
var client = new postmark.ServerClient("server token");
client.sendEmail({
    "From": "sender@example.com",
    "To": "receiver@example.com",
    "Subject": "Test",
    "TextBody": "Hello from Postmark!"
});