diff --git a/app/src/main/java/eu/faircode/email/ServiceSynchronize.java b/app/src/main/java/eu/faircode/email/ServiceSynchronize.java
index ac5fdf567c..9a132e9926 100644
--- a/app/src/main/java/eu/faircode/email/ServiceSynchronize.java
+++ b/app/src/main/java/eu/faircode/email/ServiceSynchronize.java
@@ -596,6 +596,7 @@ public class ServiceSynchronize extends LifecycleService {
                 .setAutoCancel(false)
                 .setShowWhen(true)
                 .setPriority(Notification.PRIORITY_MAX)
+                .setOnlyAlertOnce(true)
                 .setCategory(Notification.CATEGORY_ERROR)
                 .setVisibility(Notification.VISIBILITY_SECRET);