Add option to set X-Original-To for systems that route on envelope addressing

actionmailbox/app/controllers/rails/conductor/action_mailbox/inbound_emails_controller.rb

@@ -20,7 +20,7 @@ module Rails
 
     private
       def new_mail
-        Mail.new(params.require(:mail).permit(:from, :to, :cc, :bcc, :in_reply_to, :subject, :body).to_h).tap do |mail|
+        Mail.new(params.require(:mail).permit(:from, :to, :cc, :bcc, :x_original_to, :in_reply_to, :subject, :body).to_h).tap do |mail|
           mail[:bcc]&.include_in_headers = true
           params[:mail][:attachments].to_a.each do |attachment|
             mail.add_file(filename: attachment.original_filename, content: attachment.read)

actionmailbox/app/views/rails/conductor/action_mailbox/inbound_emails/new.html.erb

@@ -23,6 +23,11 @@
     <%= form.text_field :bcc %>
   </div>
 
+  <div>
+    <%= form.label :x_original_to, "X-Original-To" %><br>
+    <%= form.text_field :x_original_to %>
+  </div>
+
   <div>
     <%= form.label :in_reply_to, "In-Reply-To" %><br>
     <%= form.text_field :in_reply_to %>