From d6679d175181e425f52e5a6b062bc2c5545ce0cc Mon Sep 17 00:00:00 2001
From: Claire <claire.github-309c@sitedethib.com>
Date: Fri, 3 Mar 2023 20:44:46 +0100
Subject: [PATCH] Add mail headers to avoid auto-replies (#23597)

---
 app/mailers/application_mailer.rb | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index 73b623576c3..35f0b5fee18 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -7,9 +7,17 @@ class ApplicationMailer < ActionMailer::Base
   helper :instance
   helper :formatting
 
+  after_action :set_autoreply_headers!
+
   protected
 
   def locale_for_account(account, &block)
     I18n.with_locale(account.user_locale || I18n.default_locale, &block)
   end
+
+  def set_autoreply_headers!
+    headers['Precedence'] = 'list'
+    headers['X-Auto-Response-Suppress'] = 'All'
+    headers['Auto-Submitted'] = 'auto-generated'
+  end
 end