Send mail using mailgun

Gemfile

@@ -48,6 +48,9 @@ gem 'request_store'
 gem 'elasticsearch-model'
 gem 'elasticsearch-rails'
 
+
+gem 'mailgun-ruby'
+
 # needed for looser jpeg header compat
 gem 'ruby-imagespec', :require => "image_spec", :git => "https://github.com/r888888888/ruby-imagespec.git", :branch => "exif-fixes"
 

Gemfile.lock

@@ -186,6 +186,8 @@ GEM
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
+    mailgun-ruby (1.2.0)
+      rest-client (~> 2.0.2)
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     mechanize (2.7.6)
@@ -229,6 +231,7 @@ GEM
     net-sftp (2.1.2)
       net-ssh (>= 2.6.5)
     net-ssh (5.2.0)
+    netrc (0.11.0)
     newrelic_rpm (6.5.0.357)
     nio4r (2.5.1)
     nokogiri (1.10.4)
@@ -304,6 +307,15 @@ GEM
     responders (3.0.0)
       actionpack (>= 5.0)
       railties (>= 5.0)
+    rest-client (2.0.2)
+      http-cookie (>= 1.0.2, < 2.0)
+      mime-types (>= 1.16, < 4.0)
+      netrc (~> 0.8)
+    rest-client (2.0.2-x64-mingw32)
+      ffi (~> 1.9)
+      http-cookie (>= 1.0.2, < 2.0)
+      mime-types (>= 1.16, < 4.0)
+      netrc (~> 0.8)
     retriable (3.1.2)
     ruby-vips (2.0.14)
       ffi (~> 1.9)
@@ -431,6 +443,7 @@ DEPENDENCIES
   httparty
   jquery-rails
   listen
+  mailgun-ruby
   mechanize
   memoist
   minitest-ci

app/mailers/maintenance/user/email_confirmation_mailer.rb

@@ -3,10 +3,11 @@ module Maintenance
     class EmailConfirmationMailer < ActionMailer::Base
       add_template_helper ApplicationHelper
       add_template_helper UsersHelper
+      default :from => Danbooru.config.mail_from_addr, :content_type => "text/html"
 
       def confirmation(user)
         @user = user
-        mail(:to => @user.email, :subject => "#{Danbooru.config.app_name} account confirmation", :from => Danbooru.config.contact_email)
+        mail(:to => @user.email, :subject => "#{Danbooru.config.app_name} account confirmation")
       end
     end
   end

app/mailers/maintenance/user/login_reminder_mailer.rb

@@ -1,10 +1,12 @@
 module Maintenance
   module User
     class LoginReminderMailer < ActionMailer::Base
+      default :from => Danbooru.config.mail_from_addr, :content_type => "text/html"
+
       def notice(user)
         @user = user
         if user.email.present?
-          mail(:to => user.email, :subject => "#{Danbooru.config.app_name} login reminder", :from => Danbooru.config.contact_email)
+          mail(:to => user.email, :subject => "#{Danbooru.config.app_name} login reminder")
         end
       end
     end

app/mailers/maintenance/user/password_reset_mailer.rb

@@ -1,10 +1,12 @@
 module Maintenance
   module User
     class PasswordResetMailer < ActionMailer::Base
+      default :from => Danbooru.config.mail_from_addr, :content_type => "text/html"
+
       def reset_request(user, nonce)
         @user = user
         @nonce = nonce
-        mail(:to => @user.email, :subject => "#{Danbooru.config.app_name} password reset", :from => Danbooru.config.contact_email)
+        mail(:to => @user.email, :subject => "#{Danbooru.config.app_name} password reset")
       end
     end
   end

app/mailers/user_mailer.rb

@@ -1,7 +1,7 @@
 class UserMailer < ActionMailer::Base
   add_template_helper ApplicationHelper
   add_template_helper UsersHelper
-  default :from => Danbooru.config.contact_email, :content_type => "text/html"
+  default :from => Danbooru.config.mail_from_addr, :content_type => "text/html"
 
   def dmail_notice(dmail)
     @dmail = dmail

config/danbooru_default_config.rb

@@ -767,6 +767,18 @@ fart'
       "zDMSATq0W3hmA5p3rKTgD"
     end
 
+    def mailgun_api_key
+      ''
+    end
+
+    def mailgun_domain
+      ''
+    end
+
+    def mail_from_addr
+      'noreply@localhost'
+    end
+
     # impose additional requirements to create tag aliases and implications
     def strict_tag_requirements
       true

config/environments/production.rb

@@ -62,6 +62,12 @@ Rails.application.configure do
 
   config.action_mailer.perform_caching = false
 
+  config.action_mailer.delivery_method = :mailgun
+  config.action_mailer.mailgun_settings = {
+      api_key: Danbooru.config.mailgun_api_key,
+      domain: Danbooru.config.mailgun_domain
+  }
+
   # Ignore bad email addresses and do not raise email delivery errors.
   # Set this to true and configure the email server for immediate delivery to raise delivery errors.
   # config.action_mailer.raise_delivery_errors = false