Add handling for bounce mails

app/mail_receivers/bounce_mail_receiver.rb

@@ -0,0 +1,17 @@
+class BounceMailReceiver
+
+  def self.regexp
+    /bounce\+(?<local>.*)=(?<domain>[^=]+)/
+  end
+
+  def received(match, data)
+    address = "#{match[:local]}@#{match[:domain]}"
+    mail = Mail.new data
+    subject = mail.subject || 'Unknown bounce error'
+    MailDeliveryStatus.create email: address,
+                              message: subject,
+                              attachment_mime: 'message/rfc822',
+                              attachment_data: data
+  end
+
+end

app/mailers/mailer.rb

@@ -89,6 +89,12 @@ class Mailer < ActionMailer::Base
       args[k] = "#{show_user user} <#{user.email}>" if user.is_a? User
     end
 
+    reply_email_domain = FoodsoftConfig[:reply_email_domain]
+    if reply_email_domain && !args[:return_path]
+      address = Mail::Parsers::AddressListsParser.new.parse(args[:to]).addresses.first
+      args[:return_path] = "<#{FoodsoftConfig.scope}.bounce+#{address.local}=#{address.domain}@#{reply_email_domain}>"
+    end
+
     super
   end
 

config/initializers/mail_receiver.rb

@@ -0,0 +1 @@
+FoodsoftMailReceiver.register BounceMailReceiver