improved logging

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

src/main/java/de/srsoftware/widerhall/data/MailingList.java

@@ -447,8 +447,8 @@ public class MailingList implements MessageHandler, ProblemListener {
     @Override
     public void onMessageReceived(Message message) throws MessagingException {
         String subject = message.getSubject();
-	Address from = message.getFrom()[0];
-        LOG.info("Message received: \"{}\" from {}",subject, from);
+		Address from = message.getFrom()[0];
+        LOG.info("{} received message: \"{}\" from {}",name ,subject, from);
 
         try {
             if (subject.toLowerCase().contains("undelivered")){