diff --git a/full/src/main/java/de/ids_mannheim/korap/service/MailService.java b/full/src/main/java/de/ids_mannheim/korap/service/MailService.java
index 75d5176..ff05bbe 100644
--- a/full/src/main/java/de/ids_mannheim/korap/service/MailService.java
+++ b/full/src/main/java/de/ids_mannheim/korap/service/MailService.java
@@ -45,7 +45,7 @@
                 MimeMessageHelper message = new MimeMessageHelper(mimeMessage);
                 message.setTo(new InternetAddress(invitee.getEmail()));
                 message.setFrom(sender);
-                message.setSubject("Invitation to join group");
+                message.setSubject("Invitation to join "+groupName);
                 message.setText(prepareText(inviteeName, groupName, inviter),
                         true);
             }
@@ -62,12 +62,8 @@
         context.put("inviter", inviter);
         
         StringWriter stringWriter = new StringWriter();
-//        URL url = getClass().getClassLoader().getResource("notification.vm");
-//        System.out.println(url);
-//        Template t = velocityEngine.getTemplate(url.toString());
-//        System.out.println(t);
         
-        velocityEngine.mergeTemplate("notification.vm",
+        velocityEngine.mergeTemplate("templates/notification.vm",
                 StandardCharsets.UTF_8.name(), context, stringWriter);
         
         String message = stringWriter.toString();
diff --git a/full/src/main/resources/WEB-INF/web.xml b/full/src/main/resources/WEB-INF/web.xml
deleted file mode 100644
index 4c2a254..0000000
--- a/full/src/main/resources/WEB-INF/web.xml
+++ /dev/null
@@ -1,5 +0,0 @@
-<resource-ref>
-  <res-ref-name>mail/Session</res-ref-name>
-  <res-type>javax.mail.Session</res-type>
-  <res-auth>Container</res-auth>
-</resource-ref>
\ No newline at end of file
diff --git a/full/src/main/resources/log4j.properties b/full/src/main/resources/log4j.properties
index e688b81..c747b68 100644
--- a/full/src/main/resources/log4j.properties
+++ b/full/src/main/resources/log4j.properties
@@ -4,9 +4,10 @@
 log4j.rootLogger=ERROR, stdout, debugLog
 log4j.logger.log=ERROR, errorLog
 
-#log4j.logger.de.ids_mannheim.korap.service.VirtualCorpusService = error, debugLog
 #log4j.logger.de.ids_mannheim.korap.web.controller.AuthenticationController = debug, debugLog, stdout
-#log4j.logger.de.ids_mannheim.korap.service.UserGroupService= stdout, debugLog
+#log4j.logger.de.ids_mannheim.korap.service.UserGroupService= debug, stdout, debugLog
+#log4j.logger.de.ids_mannheim.korap.rewrite.CollectionRewrite= debug, stdout, debugLog
+#log4j.logger.de.ids_mannheim.korap.service.MailService= debug, stdout, debugLog
 
 # Direct log messages to stdout
 log4j.appender.stdout=org.apache.log4j.ConsoleAppender
diff --git a/full/src/main/resources/templates/notification.vm b/full/src/main/resources/templates/notification.vm
new file mode 100644
index 0000000..254ad83
--- /dev/null
+++ b/full/src/main/resources/templates/notification.vm
@@ -0,0 +1,12 @@
+<html>
+    <body>
+        <h3>Hi $username,</h3>
+        <p> you have been invited to group $group by $inviter! </p>
+        <p> Please login to <a href="https://korap.ids-mannheim.de/kalamar">KorAP</a> with your
+            account to accept or reject this invitation within 30 minutes. </p>
+        <p>After joining a group, you will be able to access virtual corpora shared with members of
+            the group. If you would like share your virtual corpus to a group, please contact the
+            group admin.</p>
+        <p> This is an automated generated email. Please do not reply directly to this e-mail. </p>
+    </body>
+</html>
\ No newline at end of file