Update trigger recipient to use reply_to in default auto responders.

db/migrate/20170516000001_trigger_recipient_update.rb

@@ -0,0 +1,19 @@
+class TriggerRecipientUpdate < ActiveRecord::Migration
+  def up
+
+    # return if it's a new setup
+    return if !Setting.find_by(name: 'system_init_done')
+
+    ['auto reply (on new tickets)', 'auto reply (on follow up of tickets)'].each { |name|
+      trigger = Trigger.find_by(name: name)
+      next if !trigger
+      next if !trigger.perform
+      next if !trigger.perform['notification.email']
+      next if !trigger.perform['notification.email']['recipient']
+      next if trigger.perform['notification.email']['recipient'] != 'ticket_customer'
+      trigger.perform['notification.email']['recipient'] = 'article_last_sender'
+      trigger.save
+    }
+
+  end
+end

db/seeds/triggers.rb

@@ -33,7 +33,7 @@ Trigger.create_or_update(
 <div>Your #{config.product_name} Team</div>
 <br/>
 <div><i><a href="https://zammad.com">Zammad</a>, your customer support system</i></div>',
-      'recipient' => 'ticket_customer',
+      'recipient' => 'article_last_sender',
       'subject' => 'Thanks for your inquiry (#{ticket.title})',
     },
   },
@@ -72,7 +72,7 @@ Trigger.create_or_update(
 <div>Your #{config.product_name} Team</div>
 <br/>
 <div><i><a href="https://zammad.com">Zammad</a>, your customer support system</i></div>',
-      'recipient' => 'ticket_customer',
+      'recipient' => 'article_last_sender',
       'subject' => 'Thanks for your follow up (#{ticket.title})',
     },
   },