From f62225dbdecdd8169b17fb19caa2f998b5993527 Mon Sep 17 00:00:00 2001
From: Martin Edenhofer <me@edenhofer.de>
Date: Sun, 3 Dec 2017 17:32:33 +0100
Subject: [PATCH] Improved white listing for mail probing.

---
 lib/email_helper/probe.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/email_helper/probe.rb b/lib/email_helper/probe.rb
index a62ca50cb..bf308fb59 100644
--- a/lib/email_helper/probe.rb
+++ b/lib/email_helper/probe.rb
@@ -336,6 +336,7 @@ returns on fail
         if !subject
           white_map = {
             'Recipient address rejected' => true,
+            'Sender address rejected: Domain not found' => true,
           }
           white_map.each do |key, _message|