diff --git a/src/main/java/net/geant/nmaas/notifications/NotificationManager.java b/src/main/java/net/geant/nmaas/notifications/NotificationManager.java
index 21d862fbd87dd0343cf07129dd519bdf3537a891..28925c36fccb0f30cb46c83f30ec5d699981022a 100644
--- a/src/main/java/net/geant/nmaas/notifications/NotificationManager.java
+++ b/src/main/java/net/geant/nmaas/notifications/NotificationManager.java
@@ -163,7 +163,7 @@ public class NotificationManager {
                 });
 
                 List<VlabAppListElement> appList = objectMapper.convertValue(mailAttributes.getOtherAttributes().get("appList"), new TypeReference<List<VlabAppListElement>>() {});
-                mailAttributes.getOtherAttributes().put("appList",appList.stream().map(VlabAppListElement::getAppListName).collect(Collectors.joining())) ;
+                mailAttributes.getOtherAttributes().put("appList",appList.stream().map(VlabAppListElement::getAppListName).collect(Collectors.joining(", "))) ;
 
             }
             if (contactFormKey.isEmpty()) {