Small improvements.

app/controllers/getting_started_controller.rb

@@ -704,7 +704,7 @@ curl http://localhost/api/v1/getting_started -v -u #{login}:#{password}
         :from             => email,
         :to               => email,
         :subject          => "Zammad Getting started Test Email #{subject}",
-        :body             => '.',
+        :body             => "This is a Test Email of Zammad to check if sending and receiving is working correctly.\n\nYou can ignore or delete this email.",
         'x-zammad-ignore' => 'true',
       }
     else

app/models/channel/email_send.rb

@@ -11,6 +11,7 @@ class Channel::EmailSend
     rescue Exception => e
       puts "can't use " + 'Channel::' + channel[:adapter]
       puts e.inspect
+      puts e.backtrace
     end
   end
 end