cleaned up

consumer/.ruby-gemset

@@ -1 +0,0 @@
-bettermail_consumer

consumer/bettermail_consumer.rb

@@ -1,88 +0,0 @@
-# frozen_string_literal: true
-
-require 'dotenv/load'
-require 'pg'
-require 'mail'
-require 'bunny'
-
-# Server class
-class BettermailConsumer
-  def initialize
-    @pg = PG::Connection.new(ENV['DATABASE_URL'])
-  end
-
-  def start
-    begin
-      puts ' [*] Waiting for messages. To exit press CTRL+C'
-      mail_queue = bunny_channel.queue(ENV['RABBIT_MAIL_QUEUE'])
-      mail_queue.subscribe(block: true) do |_delivery_info, _properties, body|
-        mail = Mail.read_from_string(body)
-        puts mail
-      end
-      sns_queue = bunny_channel.queue(ENV['RABBIT_SNS_QUEUE'])
-      sns_queue.subscribe(block: true) do |_delivery_info, _properties, body|
-        puts " [x] Received #{_delivery_info}"
-      end
-    rescue Interrupt => _
-      stop
-    end
-
-  end
-
-  def stop
-    @bunny_conn&.close
-    @pg&.close
-  end
-
-  def bunny_channel
-    if @bunny_channel.nil?
-      @bunny_conn = Bunny.new
-      @bunny_conn.start
-      @bunny_channel = @bunny_conn.create_channel
-    end
-    @bunny_channel
-  end
-end
-
-service_name='BetterMail::Consumer'
-# Create a new server instance for listening at localhost interfaces 127.0.0.1:2525
-# and accepting a maximum of 4 simultaneous connections per default
-service = BettermailConsumer.new
-
-# save flag for Ctrl-C pressed
-flag_status_ctrl_c_pressed = false
-
-# try to gracefully shutdown on Ctrl-C
-trap('INT') do
-  # print an empty line right after ^C
-  puts
-  # notify flag about Ctrl-C was pressed
-  flag_status_ctrl_c_pressed = true
-  # signal exit to app
-  exit 0
-end
-
-# Output for debug
-puts("Starting #{service_name}")
-
-# setup exit code
-at_exit do
-  # check to shutdown connection
-  if service
-    # Output for debug
-    puts('Ctrl-C interrupted, exit now...') if flag_status_ctrl_c_pressed
-    # info about shutdown
-    puts("Shutdown #{service_name}...")
-    # stop all threads and connections gracefully
-    service.stop
-  end
-
-  # Output for debug
-  puts "#{service_name} stopped!"
-end
-
-# Start the server
-service.start
-
-# Run on server forever
-service.join

consumer/start.sh

@@ -1 +0,0 @@
-ruby ./bettermail_consumer.rb

proxy/.ruby-gemset

@@ -1 +0,0 @@
-bettermail_proxy

proxy/Gemfile

@@ -1,7 +0,0 @@
-source 'https://rubygems.org'
-ruby '2.7.2'
-gem 'dotenv'
-gem 'bunny'
-gem 'midi-smtp-server', '~> 3.0.1'
-gem 'mail'
-gem 'openssl'

proxy/Gemfile.lock

@@ -1,34 +0,0 @@
-GEM
-  remote: https://rubygems.org/
-  specs:
-    amq-protocol (2.3.2)
-    bunny (2.19.0)
-      amq-protocol (~> 2.3, >= 2.3.1)
-      sorted_set (~> 1, >= 1.0.2)
-    dotenv (2.8.1)
-    mail (2.7.1)
-      mini_mime (>= 0.1.1)
-    midi-smtp-server (3.0.3)
-    mini_mime (1.1.2)
-    openssl (3.0.1)
-    rbtree (0.4.5)
-    set (1.0.3)
-    sorted_set (1.0.3)
-      rbtree
-      set (~> 1.0)
-
-PLATFORMS
-  ruby
-
-DEPENDENCIES
-  bunny
-  dotenv
-  mail
-  midi-smtp-server (~> 3.0.1)
-  openssl
-
-RUBY VERSION
-   ruby 2.7.2p137
-
-BUNDLED WITH
-   2.1.4

proxy/bettermail_proxy.rb

@@ -1,122 +0,0 @@
-# frozen_string_literal: true
-
-require 'dotenv/load'
-require 'midi-smtp-server'
-require 'mail'
-require 'bunny'
-
-# Server class
-class BettermailProxy < MidiSmtpServer::Smtpd
-
-  def stop(wait_seconds_before_close: nil, gracefully: nil)
-    super()
-    @bunny_conn&.close
-  end
-
-  def bunny
-    if @bunny.nil?
-      @bunny_conn = Bunny.new
-      @bunny_conn.start
-      ch = @bunny_conn.create_channel
-      ch.direct(ENV['RABBIT_CHANNEL'])
-      ch.queue(ENV['RABBIT_MAIL_QUEUE'])
-      @bunny = ch.default_exchange
-    end
-    @bunny
-  end
-
-  # update local welcome and helo response
-  def on_connect_event(ctx)
-    ctx[:server][:local_response] = 'Client connected'
-    ctx[:server][:helo_response] = 'Welcome to the BetterMail proxy - an SMTP drop in replacement'
-  end
-
-  def on_message_data_headers_event(ctx)
-    # check and append all headers
-    ctx[:message][:data] << "X-bettermail: Received by proxy at #{Time.now}" << ctx[:message][:crlf]
-  end
-
-  # check the authentication
-  # if any value returned, that will be used for ongoing processing
-  # otherwise the original value will be used for authorization_id
-  def on_auth_event(ctx, authorization_id, authentication_id, authentication)
-    # to proceed this test use commands ...
-    # auth plain
-    # > AGFkbWluaXN0cmF0b3IAcGFzc3dvcmQ=
-    # auth login
-    # > YWRtaW5pc3RyYXRvcg==
-    # > cGFzc3dvcmQ=
-    # if authorization_id == '' && authentication_id == 'administrator' && authentication == 'password'
-    #   # yes
-    #   return 'supervisor'
-    # end
-    # # otherwise exit with authentication exception
-    # raise MidiSmtpServer::Smtpd535Exception
-    logger.debug("Authenticated id: #{authentication_id} with authentication: #{authentication} from: #{ctx[:server][:remote_ip]}:#{ctx[:server][:remote_port]}")
-    authentication_id
-  end
-
-
-  # get each message after DATA <message> .
-  def on_message_data_event(ctx)
-    # Just decode message once to make sure, that this message ist readable
-    mail = Mail.read_from_string(ctx[:message][:data])
-    logger.info('Message good. Sending to queue for processing')
-    bunny.publish(mail.to_s, :headers => { 'x-smtp' => mail.header.to_s }, :routing_key => ENV["RABBIT_MAIL_QUEUE"])
-    logger.info('Done')
-  end
-end
-
-# Create a new server instance for listening at localhost interfaces 127.0.0.1:2525
-# and accepting a maximum of 4 simultaneous connections per default
-service = BettermailProxy.new(
-  ports: ENV['PROXY_PORTS'],
-  hosts: ENV['PROXY_HOSTS'],
-  max_processings: 10,
-  auth_mode: :AUTH_REQUIRED,
-  tls_mode: :TLS_REQUIRED,
-  tls_cert_path: './ssl/cert.pem',
-  tls_key_path: './ssl/key.pem'
-)
-
-service_name='BetterMail::SMTPProxy'
-# Create a new server instance for listening at localhost interfaces 127.0.0.1:2525
-# and accepting a maximum of 4 simultaneous connections per default
-
-# save flag for Ctrl-C pressed
-flag_status_ctrl_c_pressed = false
-
-# try to gracefully shutdown on Ctrl-C
-trap('INT') do
-  # print an empty line right after ^C
-  puts
-  # notify flag about Ctrl-C was pressed
-  flag_status_ctrl_c_pressed = true
-  # signal exit to app
-  exit(0)
-end
-
-# Output for debug
-puts("Starting #{service_name}")
-
-# setup exit code
-at_exit do
-  # check to shutdown connection
-  if service
-    # Output for debug
-    puts('Ctrl-C interrupted, exit now...') if flag_status_ctrl_c_pressed
-    # info about shutdown
-    puts("Shutdown #{service_name}...")
-    # stop all threads and connections gracefully
-    service.stop
-  end
-
-  # Output for debug
-  puts "#{service_name} stopped!"
-end
-
-# Start the server
-service.start
-
-# Run on server forever
-service.join

proxy/start.sh

@@ -1 +0,0 @@
-ruby ./bettermail_proxy.rb

services/.gitattributes

@@ -0,0 +1,8 @@
+# See https://git-scm.com/docs/gitattributes for more about git attribute files.
+
+# Mark the database schema as having been generated.
+db/schema.rb linguist-generated
+
+
+# Mark any vendored files as having been vendored.
+vendor/* linguist-vendored

services/.gitignore

@@ -0,0 +1,30 @@
+# See https://help.github.com/articles/ignoring-files for more about ignoring files.
+#
+# If you find yourself ignoring temporary files generated by your text editor
+# or operating system, you probably want to add a global ignore instead:
+#   git config --global core.excludesfile '~/.gitignore_global'
+
+# Ignore bundler config.
+/.bundle
+
+# Ignore the default SQLite database.
+/db/*.sqlite3
+/db/*.sqlite3-*
+
+# Ignore all logfiles and tempfiles.
+/log/*
+/tmp/*
+!/log/.keep
+!/tmp/.keep
+
+# Ignore pidfiles, but keep the directory.
+/tmp/pids/*
+!/tmp/pids/
+!/tmp/pids/.keep
+
+
+/public/assets
+.byebug_history
+
+# Ignore master key for decrypting credentials and more.
+/config/master.key

services/.ruby-gemset

@@ -0,0 +1 @@
+bettermail_services

services/Gemfile

@@ -0,0 +1,17 @@
+source 'https://rubygems.org'
+git_source(:github) { |repo| "https://github.com/#{repo}.git" }
+
+ruby '2.7.2'
+gem 'dotenv-rails'
+gem 'bunny'
+gem 'mail'
+gem 'pg'
+gem 'rails', '~> 6.1.7'
+gem 'midi-smtp-server', '~> 3.0.1'
+gem 'openssl'
+
+group :development do
+  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
+  gem 'listen', '~> 3.3'
+  gem 'spring'
+end

services/Gemfile.lock

@@ -0,0 +1,173 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    actioncable (6.1.7)
+      actionpack (= 6.1.7)
+      activesupport (= 6.1.7)
+      nio4r (~> 2.0)
+      websocket-driver (>= 0.6.1)
+    actionmailbox (6.1.7)
+      actionpack (= 6.1.7)
+      activejob (= 6.1.7)
+      activerecord (= 6.1.7)
+      activestorage (= 6.1.7)
+      activesupport (= 6.1.7)
+      mail (>= 2.7.1)
+    actionmailer (6.1.7)
+      actionpack (= 6.1.7)
+      actionview (= 6.1.7)
+      activejob (= 6.1.7)
+      activesupport (= 6.1.7)
+      mail (~> 2.5, >= 2.5.4)
+      rails-dom-testing (~> 2.0)
+    actionpack (6.1.7)
+      actionview (= 6.1.7)
+      activesupport (= 6.1.7)
+      rack (~> 2.0, >= 2.0.9)
+      rack-test (>= 0.6.3)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+    actiontext (6.1.7)
+      actionpack (= 6.1.7)
+      activerecord (= 6.1.7)
+      activestorage (= 6.1.7)
+      activesupport (= 6.1.7)
+      nokogiri (>= 1.8.5)
+    actionview (6.1.7)
+      activesupport (= 6.1.7)
+      builder (~> 3.1)
+      erubi (~> 1.4)
+      rails-dom-testing (~> 2.0)
+      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activejob (6.1.7)
+      activesupport (= 6.1.7)
+      globalid (>= 0.3.6)
+    activemodel (6.1.7)
+      activesupport (= 6.1.7)
+    activerecord (6.1.7)
+      activemodel (= 6.1.7)
+      activesupport (= 6.1.7)
+    activestorage (6.1.7)
+      actionpack (= 6.1.7)
+      activejob (= 6.1.7)
+      activerecord (= 6.1.7)
+      activesupport (= 6.1.7)
+      marcel (~> 1.0)
+      mini_mime (>= 1.1.0)
+    activesupport (6.1.7)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
+    amq-protocol (2.3.2)
+    builder (3.2.4)
+    bunny (2.19.0)
+      amq-protocol (~> 2.3, >= 2.3.1)
+      sorted_set (~> 1, >= 1.0.2)
+    concurrent-ruby (1.1.10)
+    crass (1.0.6)
+    dotenv (2.8.1)
+    dotenv-rails (2.8.1)
+      dotenv (= 2.8.1)
+      railties (>= 3.2)
+    erubi (1.11.0)
+    ffi (1.15.5)
+    globalid (1.0.0)
+      activesupport (>= 5.0)
+    i18n (1.12.0)
+      concurrent-ruby (~> 1.0)
+    listen (3.7.1)
+      rb-fsevent (~> 0.10, >= 0.10.3)
+      rb-inotify (~> 0.9, >= 0.9.10)
+    loofah (2.19.0)
+      crass (~> 1.0.2)
+      nokogiri (>= 1.5.9)
+    mail (2.7.1)
+      mini_mime (>= 0.1.1)
+    marcel (1.0.2)
+    method_source (1.0.0)
+    midi-smtp-server (3.0.3)
+    mini_mime (1.1.2)
+    mini_portile2 (2.8.0)
+    minitest (5.16.3)
+    nio4r (2.5.8)
+    nokogiri (1.13.9)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    openssl (3.0.1)
+    pg (1.4.4)
+    racc (1.6.0)
+    rack (2.2.4)
+    rack-test (2.0.2)
+      rack (>= 1.3)
+    rails (6.1.7)
+      actioncable (= 6.1.7)
+      actionmailbox (= 6.1.7)
+      actionmailer (= 6.1.7)
+      actionpack (= 6.1.7)
+      actiontext (= 6.1.7)
+      actionview (= 6.1.7)
+      activejob (= 6.1.7)
+      activemodel (= 6.1.7)
+      activerecord (= 6.1.7)
+      activestorage (= 6.1.7)
+      activesupport (= 6.1.7)
+      bundler (>= 1.15.0)
+      railties (= 6.1.7)
+      sprockets-rails (>= 2.0.0)
+    rails-dom-testing (2.0.3)
+      activesupport (>= 4.2.0)
+      nokogiri (>= 1.6)
+    rails-html-sanitizer (1.4.3)
+      loofah (~> 2.3)
+    railties (6.1.7)
+      actionpack (= 6.1.7)
+      activesupport (= 6.1.7)
+      method_source
+      rake (>= 12.2)
+      thor (~> 1.0)
+    rake (13.0.6)
+    rb-fsevent (0.11.2)
+    rb-inotify (0.10.1)
+      ffi (~> 1.0)
+    rbtree (0.4.5)
+    set (1.0.3)
+    sorted_set (1.0.3)
+      rbtree
+      set (~> 1.0)
+    spring (4.1.0)
+    sprockets (4.1.1)
+      concurrent-ruby (~> 1.0)
+      rack (> 1, < 3)
+    sprockets-rails (3.4.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
+      sprockets (>= 3.0.0)
+    thor (1.2.1)
+    tzinfo (2.0.5)
+      concurrent-ruby (~> 1.0)
+    websocket-driver (0.7.5)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.5)
+    zeitwerk (2.6.6)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  bunny
+  dotenv-rails
+  listen (~> 3.3)
+  mail
+  midi-smtp-server (~> 3.0.1)
+  openssl
+  pg
+  rails (~> 6.1.7)
+  spring
+
+RUBY VERSION
+   ruby 2.7.2p137
+
+BUNDLED WITH
+   2.1.4

services/README.md

@@ -0,0 +1,24 @@
+# README
+
+This README would normally document whatever steps are necessary to get the
+application up and running.
+
+Things you may want to cover:
+
+* Ruby version
+
+* System dependencies
+
+* Configuration
+
+* Database creation
+
+* Database initialization
+
+* How to run the test suite
+
+* Services (job queues, cache servers, search engines, etc.)
+
+* Deployment instructions
+
+* ...

services/Rakefile

@@ -0,0 +1,6 @@
+# Add your own tasks in files placed in lib/tasks ending in .rake,
+# for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
+
+require_relative "config/application"
+
+Rails.application.load_tasks

services/app/models/application_record.rb

@@ -0,0 +1,3 @@
+class ApplicationRecord < ActiveRecord::Base
+  self.abstract_class = true
+end

services/app/models/mail_recipient.rb

@@ -0,0 +1,4 @@
+class MailRecipient < ApplicationRecord
+  belongs_to :received_mail
+  belongs_to :recipient
+end

services/app/models/received_mail.rb

@@ -0,0 +1,4 @@
+class ReceivedMail < ApplicationRecord
+  belongs_to :sender
+  has_many :mail_recipients
+end

services/app/models/recipient.rb

@@ -0,0 +1,3 @@
+class Recipient < ApplicationRecord
+  has_many :emails, foreign_key: :recipient_id, class_name: 'MailRecipient'
+end

services/app/models/sender.rb

@@ -0,0 +1,3 @@
+class Sender < ApplicationRecord
+  has_many :sent_mails, foreign_key: :sender_id, class_name: 'ReceivedMail'
+end

services/bin/bundle

@@ -0,0 +1,114 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+#
+# This file was generated by Bundler.
+#
+# The application 'bundle' is installed as part of a gem, and
+# this file is here to facilitate running it.
+#
+
+require "rubygems"
+
+m = Module.new do
+  module_function
+
+  def invoked_as_script?
+    File.expand_path($0) == File.expand_path(__FILE__)
+  end
+
+  def env_var_version
+    ENV["BUNDLER_VERSION"]
+  end
+
+  def cli_arg_version
+    return unless invoked_as_script? # don't want to hijack other binstubs
+    return unless "update".start_with?(ARGV.first || " ") # must be running `bundle update`
+    bundler_version = nil
+    update_index = nil
+    ARGV.each_with_index do |a, i|
+      if update_index && update_index.succ == i && a =~ Gem::Version::ANCHORED_VERSION_PATTERN
+        bundler_version = a
+      end
+      next unless a =~ /\A--bundler(?:[= ](#{Gem::Version::VERSION_PATTERN}))?\z/
+      bundler_version = $1
+      update_index = i
+    end
+    bundler_version
+  end
+
+  def gemfile
+    gemfile = ENV["BUNDLE_GEMFILE"]
+    return gemfile if gemfile && !gemfile.empty?
+
+    File.expand_path("../../Gemfile", __FILE__)
+  end
+
+  def lockfile
+    lockfile =
+      case File.basename(gemfile)
+      when "gems.rb" then gemfile.sub(/\.rb$/, gemfile)
+      else "#{gemfile}.lock"
+      end
+    File.expand_path(lockfile)
+  end
+
+  def lockfile_version
+    return unless File.file?(lockfile)
+    lockfile_contents = File.read(lockfile)
+    return unless lockfile_contents =~ /\n\nBUNDLED WITH\n\s{2,}(#{Gem::Version::VERSION_PATTERN})\n/
+    Regexp.last_match(1)
+  end
+
+  def bundler_requirement
+    @bundler_requirement ||=
+      env_var_version || cli_arg_version ||
+        bundler_requirement_for(lockfile_version)
+  end
+
+  def bundler_requirement_for(version)
+    return "#{Gem::Requirement.default}.a" unless version
+
+    bundler_gem_version = Gem::Version.new(version)
+
+    requirement = bundler_gem_version.approximate_recommendation
+
+    return requirement unless Gem.rubygems_version < Gem::Version.new("2.7.0")
+
+    requirement += ".a" if bundler_gem_version.prerelease?
+
+    requirement
+  end
+
+  def load_bundler!
+    ENV["BUNDLE_GEMFILE"] ||= gemfile
+
+    activate_bundler
+  end
+
+  def activate_bundler
+    gem_error = activation_error_handling do
+      gem "bundler", bundler_requirement
+    end
+    return if gem_error.nil?
+    require_error = activation_error_handling do
+      require "bundler/version"
+    end
+    return if require_error.nil? && Gem::Requirement.new(bundler_requirement).satisfied_by?(Gem::Version.new(Bundler::VERSION))
+    warn "Activating bundler (#{bundler_requirement}) failed:\n#{gem_error.message}\n\nTo install the version of bundler this project requires, run `gem install bundler -v '#{bundler_requirement}'`"
+    exit 42
+  end
+
+  def activation_error_handling
+    yield
+    nil
+  rescue StandardError, LoadError => e
+    e
+  end
+end
+
+m.load_bundler!
+
+if m.invoked_as_script?
+  load Gem.bin_path("bundler", "bundle")
+end

services/bin/rails

@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+APP_PATH = File.expand_path('../config/application', __dir__)
+require_relative "../config/boot"
+require "rails/commands"

services/bin/rake

@@ -0,0 +1,4 @@
+#!/usr/bin/env ruby
+require_relative "../config/boot"
+require "rake"
+Rake.application.run

services/bin/setup

@@ -0,0 +1,33 @@
+#!/usr/bin/env ruby
+require "fileutils"
+
+# path to your application root.
+APP_ROOT = File.expand_path('..', __dir__)
+
+def system!(*args)
+  system(*args) || abort("\n== Command #{args} failed ==")
+end
+
+FileUtils.chdir APP_ROOT do
+  # This script is a way to set up or update your development environment automatically.
+  # This script is idempotent, so that you can run it at any time and get an expectable outcome.
+  # Add necessary setup steps to this file.
+
+  puts '== Installing dependencies =='
+  system! 'gem install bundler --conservative'
+  system('bundle check') || system!('bundle install')
+
+  # puts "\n== Copying sample files =="
+  # unless File.exist?('config/database.yml')
+  #   FileUtils.cp 'config/database.yml.sample', 'config/database.yml'
+  # end
+
+  puts "\n== Preparing database =="
+  system! 'bin/rails db:prepare'
+
+  puts "\n== Removing old logs and tempfiles =="
+  system! 'bin/rails log:clear tmp:clear'
+
+  puts "\n== Restarting application server =="
+  system! 'bin/rails restart'
+end

services/config.ru

@@ -0,0 +1,6 @@
+# This file is used by Rack-based servers to start the application.
+
+require_relative "config/environment"
+
+run Rails.application
+Rails.application.load_server

services/config/application.rb

@@ -0,0 +1,40 @@
+require_relative "boot"
+
+require "rails"
+# Pick the frameworks you want:
+require "active_model/railtie"
+require "active_record/railtie"
+# require "active_job/railtie"
+# require "active_storage/engine"
+# require "action_controller/railtie"
+# require "action_mailer/railtie"
+# require "action_mailbox/engine"
+# require "action_text/engine"
+# require "action_view/railtie"
+# require "action_cable/engine"
+require "sprockets/railtie"
+# require "rails/test_unit/railtie"
+
+# Require the gems listed in Gemfile, including any gems
+# you've limited to :test, :development, or :production.
+Bundler.require(*Rails.groups)
+
+module Consumer
+  class Application < Rails::Application
+    config.autoload_paths << Rails.root.join('lib')
+    config.eager_load_paths << Rails.root.join('lib')
+    # Initialize configuration defaults for originally generated Rails version.
+    config.load_defaults 6.1
+
+    # Configuration for the application, engines, and railties goes here.
+    #
+    # These settings can be overridden in specific environments using the files
+    # in config/environments, which are processed later.
+    #
+    # config.time_zone = "Central Time (US & Canada)"
+    # config.eager_load_paths << Rails.root.join("extras")
+
+    # Don't generate system test files.
+    config.generators.system_tests = nil
+  end
+end

services/config/boot.rb

@@ -0,0 +1,3 @@
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
+
+require "bundler/setup" # Set up gems listed in the Gemfile.

services/config/credentials.yml.enc

@@ -0,0 +1 @@
+3bgXrcBmEQAiInnCmLeo+uzTTZv/XdKvZnr5agIilz+zG5sdTcS6NKTDodS3Z9zla1eH/YPVW+b/yZbTpqf56hu/OY4WO09NA1lWsrWxIgstXCZA6GxUOMnLs1naaYuyV5L/QUo0nvL2HER3wimYr8oG0uF50tRSBdnU21XMXmrKue6noNy1FHfXzRbmqcr2DrYaEPDfEBgFVCtaRR3/lcHstUIu5LgbKThgJFUY1NCkjRQUcGKD94rACQ1FaVoJw+33syRnEEVqEE/pJDX03U+domMLf7JLsu9BqAiBxtyiy/ZmaqZ+bP+R/NiXzuLxrc7x4Lup0cExBalfRwf0PLmOYOoRfuFOhuOtkYRL7dwIVkgm8uf+vtBWLLNFdwwSgK3BsnZqp2HdUH9iLaJUBZEIxuJe0tUj3avg--3B+JnjSZfI0pkw11--gObP0g/Ae5hz20kfQwnfhA==

services/config/environment.rb

@@ -0,0 +1,5 @@
+# Load the Rails application.
+require_relative "application"
+
+# Initialize the Rails application.
+Rails.application.initialize!

services/config/environments/development.rb

@@ -0,0 +1,68 @@
+require "active_support/core_ext/integer/time"
+
+Rails.application.configure do
+  # Settings specified here will take precedence over those in config/application.rb.
+
+  # In the development environment your application's code is reloaded any time
+  # it changes. This slows down response time but is perfect for development
+  # since you don't have to restart the web server when you make code changes.
+  config.cache_classes = false
+
+  # Do not eager load code on boot.
+  config.eager_load = false
+
+  # Show full error reports.
+  config.consider_all_requests_local = true
+
+  # Enable/disable caching. By default caching is disabled.
+  # Run rails dev:cache to toggle caching.
+  if Rails.root.join('tmp', 'caching-dev.txt').exist?
+    config.action_controller.perform_caching = true
+    config.action_controller.enable_fragment_cache_logging = true
+
+    config.cache_store = :memory_store
+    config.public_file_server.headers = {
+      'Cache-Control' => "public, max-age=#{2.days.to_i}"
+    }
+  else
+    config.action_controller.perform_caching = false
+
+    config.cache_store = :null_store
+  end
+
+  # Print deprecation notices to the Rails logger.
+  config.active_support.deprecation = :log
+
+  # Raise exceptions for disallowed deprecations.
+  config.active_support.disallowed_deprecation = :raise
+
+  # Tell Active Support which deprecation messages to disallow.
+  config.active_support.disallowed_deprecation_warnings = []
+
+  # Raise an error on page load if there are pending migrations.
+  config.active_record.migration_error = :page_load
+
+  # Highlight code that triggered database queries in logs.
+  config.active_record.verbose_query_logs = true
+
+  # Debug mode disables concatenation and preprocessing of assets.
+  # This option may cause significant delays in view rendering with a large
+  # number of complex assets.
+  config.assets.debug = true
+
+  # Suppress logger output for asset requests.
+  config.assets.quiet = true
+
+  # Raises error for missing translations.
+  # config.i18n.raise_on_missing_translations = true
+
+  # Annotate rendered view with file names.
+  # config.action_view.annotate_rendered_view_with_filenames = true
+
+  # Use an evented file watcher to asynchronously detect changes in source code,
+  # routes, locales, etc. This feature depends on the listen gem.
+  config.file_watcher = ActiveSupport::EventedFileUpdateChecker
+
+  # Uncomment if you wish to allow Action Cable access from any origin.
+  # config.action_cable.disable_request_forgery_protection = true
+end

services/config/environments/production.rb

@@ -0,0 +1,103 @@
+require "active_support/core_ext/integer/time"
+
+Rails.application.configure do
+  # Settings specified here will take precedence over those in config/application.rb.
+
+  # Code is not reloaded between requests.
+  config.cache_classes = true
+
+  # Eager load code on boot. This eager loads most of Rails and
+  # your application in memory, allowing both threaded web servers
+  # and those relying on copy on write to perform better.
+  # Rake tasks automatically ignore this option for performance.
+  config.eager_load = true
+
+  # Full error reports are disabled and caching is turned on.
+  config.consider_all_requests_local       = false
+  config.action_controller.perform_caching = true
+
+  # Ensures that a master key has been made available in either ENV["RAILS_MASTER_KEY"]
+  # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
+  # config.require_master_key = true
+
+  # Disable serving static files from the `/public` folder by default since
+  # Apache or NGINX already handles this.
+  config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?
+
+  # Compress CSS using a preprocessor.
+  # config.assets.css_compressor = :sass
+
+  # Do not fallback to assets pipeline if a precompiled asset is missed.
+  config.assets.compile = false
+
+  # Enable serving of images, stylesheets, and JavaScripts from an asset server.
+  # config.asset_host = 'http://assets.example.com'
+
+  # Specifies the header that your server uses for sending files.
+  # config.action_dispatch.x_sendfile_header = 'X-Sendfile' # for Apache
+  # config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for NGINX
+
+  # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
+  # config.force_ssl = true
+
+  # Include generic and useful information about system operation, but avoid logging too much
+  # information to avoid inadvertent exposure of personally identifiable information (PII).
+  config.log_level = :info
+
+  # Prepend all log lines with the following tags.
+  config.log_tags = [ :request_id ]
+
+  # Use a different cache store in production.
+  # config.cache_store = :mem_cache_store
+
+
+  # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
+  # the I18n.default_locale when a translation cannot be found).
+  config.i18n.fallbacks = true
+
+  # Send deprecation notices to registered listeners.
+  config.active_support.deprecation = :notify
+
+  # Log disallowed deprecations.
+  config.active_support.disallowed_deprecation = :log
+
+  # Tell Active Support which deprecation messages to disallow.
+  config.active_support.disallowed_deprecation_warnings = []
+
+  # Use default logging formatter so that PID and timestamp are not suppressed.
+  config.log_formatter = ::Logger::Formatter.new
+
+  # Use a different logger for distributed setups.
+  # require "syslog/logger"
+  # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
+
+  if ENV["RAILS_LOG_TO_STDOUT"].present?
+    logger           = ActiveSupport::Logger.new(STDOUT)
+    logger.formatter = config.log_formatter
+    config.logger    = ActiveSupport::TaggedLogging.new(logger)
+  end
+
+  # Do not dump schema after migrations.
+  config.active_record.dump_schema_after_migration = false
+
+  # Inserts middleware to perform automatic connection switching.
+  # The `database_selector` hash is used to pass options to the DatabaseSelector
+  # middleware. The `delay` is used to determine how long to wait after a write
+  # to send a subsequent read to the primary.
+  #
+  # The `database_resolver` class is used by the middleware to determine which
+  # database is appropriate to use based on the time delay.
+  #
+  # The `database_resolver_context` class is used by the middleware to set
+  # timestamps for the last write to the primary. The resolver uses the context
+  # class timestamps to determine how long to wait before reading from the
+  # replica.
+  #
+  # By default Rails will store a last write timestamp in the session. The
+  # DatabaseSelector middleware is designed as such you can define your own
+  # strategy for connection switching and pass that into the middleware through
+  # these configuration options.
+  # config.active_record.database_selector = { delay: 2.seconds }
+  # config.active_record.database_resolver = ActiveRecord::Middleware::DatabaseSelector::Resolver
+  # config.active_record.database_resolver_context = ActiveRecord::Middleware::DatabaseSelector::Resolver::Session
+end

services/config/environments/test.rb

@@ -0,0 +1,49 @@
+require "active_support/core_ext/integer/time"
+
+# The test environment is used exclusively to run your application's
+# test suite. You never need to work with it otherwise. Remember that
+# your test database is "scratch space" for the test suite and is wiped
+# and recreated between test runs. Don't rely on the data there!
+
+Rails.application.configure do
+  # Settings specified here will take precedence over those in config/application.rb.
+
+  config.cache_classes = true
+
+  # Do not eager load code on boot. This avoids loading your whole application
+  # just for the purpose of running a single test. If you are using a tool that
+  # preloads Rails for running tests, you may have to set it to true.
+  config.eager_load = false
+
+  # Configure public file server for tests with Cache-Control for performance.
+  config.public_file_server.enabled = true
+  config.public_file_server.headers = {
+    'Cache-Control' => "public, max-age=#{1.hour.to_i}"
+  }
+
+  # Show full error reports and disable caching.
+  config.consider_all_requests_local       = true
+  config.action_controller.perform_caching = false
+  config.cache_store = :null_store
+
+  # Raise exceptions instead of rendering exception templates.
+  config.action_dispatch.show_exceptions = false
+
+  # Disable request forgery protection in test environment.
+  config.action_controller.allow_forgery_protection = false
+
+  # Print deprecation notices to the stderr.
+  config.active_support.deprecation = :stderr
+
+  # Raise exceptions for disallowed deprecations.
+  config.active_support.disallowed_deprecation = :raise
+
+  # Tell Active Support which deprecation messages to disallow.
+  config.active_support.disallowed_deprecation_warnings = []
+
+  # Raises error for missing translations.
+  # config.i18n.raise_on_missing_translations = true
+
+  # Annotate rendered view with file names.
+  # config.action_view.annotate_rendered_view_with_filenames = true
+end

services/config/locales/en.yml

@@ -0,0 +1,33 @@
+# Files in the config/locales directory are used for internationalization
+# and are automatically loaded by Rails. If you want to use locales other
+# than English, add the necessary files in this directory.
+#
+# To use the locales, use `I18n.t`:
+#
+#     I18n.t 'hello'
+#
+# In views, this is aliased to just `t`:
+#
+#     <%= t('hello') %>
+#
+# To use a different locale, set it with `I18n.locale`:
+#
+#     I18n.locale = :es
+#
+# This would use the information in config/locales/es.yml.
+#
+# The following keys must be escaped otherwise they will not be retrieved by
+# the default I18n backend:
+#
+# true, false, on, off, yes, no
+#
+# Instead, surround them with single quotes.
+#
+# en:
+#   'true': 'foo'
+#
+# To learn more, please read the Rails Internationalization guide
+# available at https://guides.rubyonrails.org/i18n.html.
+
+en:
+  hello: "Hello world"

services/config/puma.rb

@@ -0,0 +1,43 @@
+# Puma can serve each request in a thread from an internal thread pool.
+# The `threads` method setting takes two numbers: a minimum and maximum.
+# Any libraries that use thread pools should be configured to match
+# the maximum value specified for Puma. Default is set to 5 threads for minimum
+# and maximum; this matches the default thread size of Active Record.
+#
+max_threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
+min_threads_count = ENV.fetch("RAILS_MIN_THREADS") { max_threads_count }
+threads min_threads_count, max_threads_count
+
+# Specifies the `worker_timeout` threshold that Puma will use to wait before
+# terminating a worker in development environments.
+#
+worker_timeout 3600 if ENV.fetch("RAILS_ENV", "development") == "development"
+
+# Specifies the `port` that Puma will listen on to receive requests; default is 3000.
+#
+port ENV.fetch("PORT") { 3000 }
+
+# Specifies the `environment` that Puma will run in.
+#
+environment ENV.fetch("RAILS_ENV") { "development" }
+
+# Specifies the `pidfile` that Puma will use.
+pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
+
+# Specifies the number of `workers` to boot in clustered mode.
+# Workers are forked web server processes. If using threads and workers together
+# the concurrency of the application would be max `threads` * `workers`.
+# Workers do not work on JRuby or Windows (both of which do not support
+# processes).
+#
+# workers ENV.fetch("WEB_CONCURRENCY") { 2 }
+
+# Use the `preload_app!` method when specifying a `workers` number.
+# This directive tells Puma to first boot the application and load code
+# before forking the application. This takes advantage of Copy On Write
+# process behavior so workers use less memory.
+#
+# preload_app!
+
+# Allow puma to be restarted by `rails restart` command.
+plugin :tmp_restart

services/config/routes.rb

@@ -0,0 +1,3 @@
+Rails.application.routes.draw do
+  # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
+end

services/db/migrate/20221115164901_setup.rb

@@ -0,0 +1,39 @@
+class Setup < ActiveRecord::Migration[6.1]
+  def change
+    enable_extension 'uuid-ossp'
+    enable_extension 'pgcrypto'
+
+    create_table :senders, id: :string do |t|
+      t.timestamps
+    end
+
+    create_table :recipients, id: :string do |t|
+      t.string :verification_status, default: 'unverified', nullable: false
+      t.datetime :last_verified_at, nullable: true
+      t.string :bounce_status , default: 'unknown'
+      t.datetime :bounce_status_changed_at, nullable: true
+      t.timestamps
+    end
+
+    create_table :received_mails, id: :uuid do |t|
+      t.string :sender_id, nullable: false
+      t.string :message_id, nullable: false
+      t.binary :body, nullable: false
+      t.string :delivery_status, default: 'queued', nullable: false
+      t.string :delivery_status_changed_at
+      t.timestamps
+    end
+
+    create_table :mail_recipients, id: false do |t|
+      t.uuid :received_mail_id
+      t.string :recipient_id
+      t.string :delivery_status, default: 'delivered', nullable: false
+      t.string :delivery_status_changed_at
+      t.timestamps
+    end
+
+    add_index :received_mails, :sender_id
+    add_index :received_mails, :message_id, unique: true
+    add_index :mail_recipients, %i[received_mail_id recipient_id], unique: true
+  end
+end

services/db/schema.rb

@@ -0,0 +1,56 @@
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# This file is the source Rails uses to define your schema when running `bin/rails
+# db:schema:load`. When creating a new database, `bin/rails db:schema:load` tends to
+# be faster and is potentially less error prone than running all of your
+# migrations from scratch. Old migrations may fail to apply correctly if those
+# migrations use external dependencies or application code.
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 2022_11_15_164901) do
+
+  # These are extensions that must be enabled in order to support this database
+  enable_extension "pgcrypto"
+  enable_extension "plpgsql"
+  enable_extension "uuid-ossp"
+
+  create_table "mail_recipients", id: false, force: :cascade do |t|
+    t.uuid "received_mail_id"
+    t.string "recipient_id"
+    t.string "delivery_status", default: "delivered"
+    t.string "delivery_status_changed_at"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["received_mail_id", "recipient_id"], name: "index_mail_recipients_on_received_mail_id_and_recipient_id", unique: true
+  end
+
+  create_table "received_mails", id: :uuid, default: -> { "gen_random_uuid()" }, force: :cascade do |t|
+    t.string "sender_id"
+    t.string "message_id"
+    t.binary "body"
+    t.string "delivery_status", default: "queued"
+    t.string "delivery_status_changed_at"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["message_id"], name: "index_received_mails_on_message_id", unique: true
+    t.index ["sender_id"], name: "index_received_mails_on_sender_id"
+  end
+
+  create_table "recipients", id: :string, force: :cascade do |t|
+    t.string "verification_status", default: "unverified"
+    t.datetime "last_verified_at"
+    t.string "bounce_status", default: "unknown"
+    t.datetime "bounce_status_changed_at"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
+  create_table "senders", id: :string, force: :cascade do |t|
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
+end

services/db/seeds.rb

@@ -0,0 +1,7 @@
+# This file should contain all the record creation needed to seed the database with its default values.
+# The data can then be loaded with the bin/rails db:seed command (or created alongside the database with db:setup).
+#
+# Examples:
+#
+#   movies = Movie.create([{ name: 'Star Wars' }, { name: 'Lord of the Rings' }])
+#   Character.create(name: 'Luke', movie: movies.first)

services/lib/bettermail/consumer.rb

@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+require 'mail'
+require 'bunny'
+
+# in module for neatness
+module Bettermail
+  # The General purpose consumer
+  class Consumer
+    def initialize
+    end
+
+    def default_smtp_settings
+      {
+        address: ENV['DEFAULT_SMTP_HOST'],
+        port: ENV['DEFAULT_SMTP_PORT'],
+        user_name: ENV['DEFAULT_SMTP_UID'],
+        password: ENV['DEFAULT_SMTP_PWD'],
+        enable_starttls_auto: true,
+        authentication: 'plain',
+      }
+    end
+
+
+
+    def start
+      begin
+        puts ' [*] Waiting for messages. To exit press CTRL+C'
+        new_mail_queue = bunny_channel.queue(ENV['RABBIT_MAIL_QUEUE'])
+        new_mail_queue.subscribe(block: true) do |_delivery_info, _properties, body|
+          instructions = JSON.parse(body)
+          recipient = Recipient.create_or_find_by(id: instructions["recipient"])
+          email = ReceivedMail.find_by(message_id: instructions["message"])
+          recipient.emails.create(received_mail: email, delivery_status: 'queued')
+        end
+        sns_queue = bunny_channel.queue(ENV['RABBIT_SNS_QUEUE'])
+        sns_queue.subscribe(block: true) do |_delivery_info, _properties, body|
+          puts " [x] Received #{_delivery_info}"
+        end
+      rescue Interrupt => _
+        stop
+      end
+    end
+
+    def send_mail(mail)
+      mail.delivery_method :smtp, default_smtp_settings
+      mail.deliver!
+    end
+
+    def stop
+      @bunny_conn&.close
+    end
+
+    def bunny_channel
+      if @bunny_channel.nil?
+        @bunny_conn = Bunny.new
+        @bunny_conn.start
+        @bunny_channel = @bunny_conn.create_channel
+      end
+      @bunny_channel
+    end
+  end
+end

services/lib/bettermail/proxy.rb

@@ -0,0 +1,79 @@
+# frozen_string_literal: true
+
+require 'midi-smtp-server'
+require 'mail'
+require 'bunny'
+require 'securerandom'
+
+# in module for neatness
+module Bettermail
+  # The SMTPProxy
+  class Proxy < MidiSmtpServer::Smtpd
+
+    def stop(wait_seconds_before_close: nil, gracefully: nil)
+      super()
+      @bunny_conn&.close
+    end
+
+    def bunny
+      if @bunny.nil?
+        @bunny_conn = Bunny.new
+        @bunny_conn.start
+        ch = @bunny_conn.create_channel
+        ch.direct(ENV['RABBIT_CHANNEL'])
+        ch.queue(ENV['RABBIT_MAIL_QUEUE'])
+        @bunny = ch.default_exchange
+      end
+      @bunny
+    end
+
+    # update local welcome and helo response
+    def on_connect_event(ctx)
+      ctx[:server][:local_response] = 'Client connected'
+      ctx[:server][:helo_response] = 'Welcome to the BetterMail proxy - an SMTP drop in replacement'
+    end
+
+    def on_message_data_headers_event(ctx)
+      # check and append all headers
+      ctx[:message][:data] << "X-bettermail: Received by proxy at #{Time.now}" << ctx[:message][:crlf]
+    end
+
+    # check the authentication
+    # if any value returned, that will be used for ongoing processing
+    # otherwise the original value will be used for authorization_id
+    def on_auth_event(ctx, authorization_id, authentication_id, authentication)
+      # to proceed this test use commands ...
+      # auth plain
+      # > AGFkbWluaXN0cmF0b3IAcGFzc3dvcmQ=
+      # auth login
+      # > YWRtaW5pc3RyYXRvcg==
+      # > cGFzc3dvcmQ=
+      # if authorization_id == '' && authentication_id == 'administrator' && authentication == 'password'
+      #   # yes
+      #   return 'supervisor'
+      # end
+      # # otherwise exit with authentication exception
+      # raise MidiSmtpServer::Smtpd535Exception
+      logger.debug("Authenticated id: #{authentication_id} with authentication: #{authentication} from: #{ctx[:server][:remote_ip]}:#{ctx[:server][:remote_port]}")
+      authentication_id
+    end
+
+    def save_mail(ctx, sender)
+      mail = Mail.read_from_string(ctx[:message][:data])
+      sender = Sender.create_or_find_by(id: sender)
+      message_id = "#{SecureRandom.uuid}@bettermail.wizewerx.tech"
+      saved_mail = sender.sent_mails.create(message_id: message_id, body: mail.to_s)
+      message_id
+    end
+
+    def on_mail_from_event(ctx, mail_from_data)
+      # tag the message here OR write it once to the database
+      ctx[:message][:message_id] = save_mail(ctx, mail_from_data)
+    end
+
+    # simple rewrite and return value
+    def on_rcpt_to_event(ctx, data)
+      bunny.publish({message: ctx[:message][:message_id], recipient: data}.to_json, :headers => { }, :routing_key => ENV["RABBIT_MAIL_QUEUE"])
+    end
+  end
+end

services/lib/tasks/consumer.rake

@@ -0,0 +1,46 @@
+namespace :consumer do
+  task start: :environment do
+    service_name = 'BetterMail::Consumer'
+    # Create a new server instance for listening at localhost interfaces 127.0.0.1:2525
+    # and accepting a maximum of 4 simultaneous connections per default
+    service = Bettermail::Consumer.new
+
+    # save flag for Ctrl-C pressed
+    flag_status_ctrl_c_pressed = false
+
+    # try to gracefully shutdown on Ctrl-C
+    trap('INT') do
+      # print an empty line right after ^C
+      puts
+      # notify flag about Ctrl-C was pressed
+      flag_status_ctrl_c_pressed = true
+      # signal exit to app
+      exit 0
+    end
+
+    # Output for debug
+    puts("Starting #{service_name}")
+
+    # setup exit code
+    at_exit do
+      # check to shutdown connection
+      if service
+        # Output for debug
+        puts('Ctrl-C interrupted, exit now...') if flag_status_ctrl_c_pressed
+        # info about shutdown
+        puts("Shutdown #{service_name}...")
+        # stop all threads and connections gracefully
+        service.stop
+      end
+
+      # Output for debug
+      puts "#{service_name} stopped!"
+    end
+
+    # Start the server
+    service.start
+
+    # Run on server forever
+    service.join
+  end
+end

services/lib/tasks/proxy.rake

@@ -0,0 +1,58 @@
+namespace :proxy do
+  task start: :environment do
+    # Create a new server instance for listening at localhost interfaces 127.0.0.1:2525
+    # and accepting a maximum of 4 simultaneous connections per default
+    service = Bettermail::Proxy.new(
+      ports: ENV['PROXY_PORTS'],
+      hosts: ENV['PROXY_HOSTS'],
+      max_processings: 10,
+      auth_mode: :AUTH_REQUIRED,
+      tls_mode: :TLS_REQUIRED,
+      tls_cert_path: './ssl/cert.pem',
+      tls_key_path: './ssl/key.pem'
+    )
+
+    service_name = 'BetterMail::SMTPProxy'
+    # Create a new server instance for listening at localhost interfaces 127.0.0.1:2525
+    # and accepting a maximum of 4 simultaneous connections per default
+
+    # save flag for Ctrl-C pressed
+    flag_status_ctrl_c_pressed = false
+
+    # try to gracefully shutdown on Ctrl-C
+    trap('INT') do
+      # print an empty line right after ^C
+      puts
+      # notify flag about Ctrl-C was pressed
+      flag_status_ctrl_c_pressed = true
+      # signal exit to app
+      exit(0)
+    end
+
+    # Output for debug
+    puts("Starting #{service_name}")
+
+    # setup exit code
+    at_exit do
+      # check to shutdown connection
+      if service
+        # Output for debug
+        puts('Ctrl-C interrupted, exit now...') if flag_status_ctrl_c_pressed
+        # info about shutdown
+        puts("Shutdown #{service_name}...")
+        # stop all threads and connections gracefully
+        service.stop
+      end
+
+      # Output for debug
+      puts "#{service_name} stopped!"
+    end
+
+    # Start the server
+    service.start
+
+    # Run on server forever
+    service.join
+  end
+end
+

tests/.ruby-gemset

@@ -0,0 +1 @@
+bettermail_tests

tests/Gemfile

@@ -1,6 +1,5 @@
 source 'https://rubygems.org'
 ruby '2.7.2'
-gem 'dotenv'
 gem 'bunny'
 gem 'mail'
-gem 'pg'
+

tests/Gemfile.lock

@@ -5,11 +5,9 @@ GEM
     bunny (2.19.0)
       amq-protocol (~> 2.3, >= 2.3.1)
       sorted_set (~> 1, >= 1.0.2)
-    dotenv (2.8.1)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
     mini_mime (1.1.2)
-    pg (1.4.4)
     rbtree (0.4.5)
     set (1.0.3)
     sorted_set (1.0.3)
@@ -21,9 +19,7 @@ PLATFORMS
 
 DEPENDENCIES
   bunny
-  dotenv
   mail
-  pg
 
 RUBY VERSION
    ruby 2.7.2p137

tests/test_sending_emails.rb

@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require 'mail'
+require 'bunny'
+require 'securerandom'
+
+@default_smtp_settings = {
+      address: 'localhost',
+      port: '2025',
+      user_name: 'hello',
+      password: 'world',
+      enable_starttls_auto: true,
+      authentication: 'plain',
+      openssl_verify_mode: 'none'
+    }
+
+def send_mail(index)
+  mail = Mail.new(
+    from: "test-#{index}-#{SecureRandom.uuid}@thefactory.local",
+    to: "#{SecureRandom.uuid}@acme.local",
+    cc: "cc-#{SecureRandom.uuid}@acme.local",
+    bcc: "bcc-#{SecureRandom.uuid}@acme.local",
+    subject: "Testing #{index}",
+  )
+  mail.delivery_method :smtp, @default_smtp_settings
+  mail.deliver!
+end
+
+number_of_emails = ARGV[0] || 1
+
+send_mail number_of_emails