diff --git a/src/mail.js b/src/mail.js
index 2691ce312..0ef793192 100644
--- a/src/mail.js
+++ b/src/mail.js
@@ -118,7 +118,7 @@ function checkOutboundPort25(callback) {
         'smtp.mail.yahoo.com',
         'smtp.o2.ie',
         'smtp.comcast.net',
-        'outgoing.verizon.net'
+        'smtp.1und1.de',
     ]);
 
     var relay = {