first milestone:

We are sucessfully receiving push mails and sending notifications upon receiving emails.
Next step:
Enable Online configuration

src/main/java/de/srsoftware/widerhall/Application.java

@@ -15,10 +15,9 @@ public class Application {
         var config = Files.readString(new File("/tmp/config.json").toPath());
         JSONObject json = (JSONObject) parser.parse(config);
 
-        //String testSender = (String) json.get("sender");
-        //String testReceiver = (String) json.get("receiver");
-     //   new SmtpClient(json).send(json,testSender,"Stephan Richter",testReceiver,"Test","Dies ist ein Test");
-        MessageHandler forward = new Forwarder();
-       new ImapClient(json).addListener(forward).start();
+        MessageHandler forward = new Forwarder(json);
+       new ImapClient(json)
+               .addListener(forward)
+               .start();
     }
 }

src/main/java/de/srsoftware/widerhall/Constants.java

@@ -6,4 +6,5 @@ public class Constants {
     public static final String HOST = "host";
     public static final String USER = "user";
     public static final String PASSWORD = "password";
+    public static final String INBOX = "inbox";
 }

src/main/java/de/srsoftware/widerhall/Forwarder.java

@@ -1,15 +1,34 @@
 package de.srsoftware.widerhall;
 
+import org.json.simple.JSONObject;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import javax.mail.Message;
 import javax.mail.MessagingException;
+import java.io.UnsupportedEncodingException;
 
 public class Forwarder implements MessageHandler {
     private static final Logger LOG = LoggerFactory.getLogger(Forwarder.class);
+    private final SmtpClient smtp;
+    private final JSONObject config;
+
+    public Forwarder(JSONObject config) {
+        this.config = config;
+        SmtpClient smtp = new SmtpClient(config);
+        this.smtp = smtp;
+    }
+
     @Override
     public void onMessageReceived(Message message) throws MessagingException {
         LOG.debug("forwarding {}",message.getSubject());
+        String testSender = (String) config.get("sender");
+        String testReceiver = (String) config.get("receiver");
+
+        try {
+            smtp.send(config,testSender,"Stephan Richter",testReceiver,"Info: "+message.getSubject(),"Neue Mail eingegangen!");
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
+        }
     }
 }

src/main/java/de/srsoftware/widerhall/ImapClient.java

@@ -24,11 +24,6 @@ public class ImapClient {
     private class ListeningThread extends Thread {
 
         private static final Logger LOG = LoggerFactory.getLogger(ListeningThread.class);
-        private final JSONObject config;
-
-        ListeningThread(JSONObject config){
-            this.config = config;
-        }
 
         @Override
         public void run() {
@@ -50,13 +45,14 @@ public class ImapClient {
             String host = (String) config.get(Constants.HOST);
             String username = (String) config.get(Constants.USER);
             String password = (String) config.get(Constants.PASSWORD);
+            String folderName = (String) config.get(Constants.INBOX);
             LOG.debug("Connecting and logging in…");
             Properties props = imapProps();
             Session session = Session.getInstance(props);
             Store store = session.getStore(Constants.IMAPS);
             store.connect(host,username,password);
-            LOG.debug("Connected, opening inbox:");
-            inbox = (IMAPFolder)store.getFolder("INBOX");
+            LOG.debug("Connected, opening {}:",folderName);
+            inbox = (IMAPFolder)store.getFolder(folderName);
             inbox.open(IMAPFolder.READ_WRITE);
 
             while (!stopped){
@@ -116,7 +112,7 @@ public class ImapClient {
 
     public void start() {
         LOG.debug("Creating ListeningThread…");
-        new ListeningThread(config).start();
+        new ListeningThread().start();
         LOG.debug("Creating Heartbeat…");
         new Heartbeat().start();
     }

src/main/java/de/srsoftware/widerhall/SmtpClient.java

@@ -35,7 +35,6 @@ public class SmtpClient {
         props.put(PORT,port);
         props.put(AUTH,true);
         props.put(SSL,true);
-//        props.put("mail.smtp.localhost","mail.keawe.de");
 
         session = Session.getInstance(props);
         LOG.debug("Created new {}: {}", getClass().getSimpleName(),session);