diff --git a/app/src/main/java/eu/faircode/email/Core.java b/app/src/main/java/eu/faircode/email/Core.java
index 35e824456c..febc6b03d5 100644
--- a/app/src/main/java/eu/faircode/email/Core.java
+++ b/app/src/main/java/eu/faircode/email/Core.java
@@ -1501,6 +1501,8 @@ class Core {
             EntityAccount account, final EntityFolder folder,
             POP3Folder ifolder, POP3Store istore, State state) throws MessagingException {
         DB db = DB.getInstance(context);
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        boolean notify_known = prefs.getBoolean("notify_known", false);
 
         Log.i(folder.name + " POP sync type=" + folder.type + " connected=" + (ifolder != null));
 
@@ -1641,6 +1643,8 @@ class Core {
                         message.sender = MessageHelper.getSortKey(message.from);
                         Uri lookupUri = ContactInfo.getLookupUri(message.from);
                         message.avatar = (lookupUri == null ? null : lookupUri.toString());
+                        if (message.avatar == null && notify_known)
+                            message.ui_ignored = true;
 
                         // No MX check
 
@@ -2142,6 +2146,7 @@ class Core {
 
         DB db = DB.getInstance(context);
         SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+        boolean notify_known = prefs.getBoolean("notify_known", false);
 
         // Find message by uid (fast, no headers required)
         EntityMessage message = db.message().getMessageByUid(folder.id, uid);
@@ -2276,6 +2281,8 @@ class Core {
             message.sender = MessageHelper.getSortKey(message.from);
             Uri lookupUri = ContactInfo.getLookupUri(message.from);
             message.avatar = (lookupUri == null ? null : lookupUri.toString());
+            if (message.avatar == null && notify_known)
+                message.ui_ignored = true;
 
             boolean check_mx = prefs.getBoolean("check_mx", false);
             if (check_mx)
diff --git a/app/src/main/java/eu/faircode/email/FragmentOptionsNotifications.java b/app/src/main/java/eu/faircode/email/FragmentOptionsNotifications.java
index 8f42c88404..a20d55d351 100644
--- a/app/src/main/java/eu/faircode/email/FragmentOptionsNotifications.java
+++ b/app/src/main/java/eu/faircode/email/FragmentOptionsNotifications.java
@@ -70,6 +70,7 @@ public class FragmentOptionsNotifications extends FragmentBase implements Shared
 
     private SwitchCompat swBadge;
     private SwitchCompat swUnseenIgnored;
+    private SwitchCompat swNotifyKnown;
     private SwitchCompat swNotifySummary;
     private SwitchCompat swNotifyRemove;
     private SwitchCompat swNotifyClear;
@@ -90,7 +91,8 @@ public class FragmentOptionsNotifications extends FragmentBase implements Shared
             "notify_flag", "notify_seen", "notify_snooze",
             "light", "sound",
             "badge", "unseen_ignored",
-            "notify_summary", "notify_remove", "notify_clear", "notify_preview", "notify_preview_all", "wearable_preview",
+            "notify_known", "notify_summary", "notify_remove", "notify_clear",
+            "notify_preview", "notify_preview_all", "wearable_preview",
             "biometrics_notify",
             "alert_once"
     };
@@ -126,6 +128,7 @@ public class FragmentOptionsNotifications extends FragmentBase implements Shared
 
         swBadge = view.findViewById(R.id.swBadge);
         swUnseenIgnored = view.findViewById(R.id.swUnseenIgnored);
+        swNotifyKnown = view.findViewById(R.id.swNotifyKnown);
         swNotifySummary = view.findViewById(R.id.swNotifySummary);
         swNotifyRemove = view.findViewById(R.id.swNotifyRemove);
         swNotifyClear = view.findViewById(R.id.swNotifyClear);
@@ -300,6 +303,14 @@ public class FragmentOptionsNotifications extends FragmentBase implements Shared
             }
         });
 
+        swNotifyKnown.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
+                prefs.edit().putBoolean("notify_known", checked).apply();
+                enableOptions();
+            }
+        });
+
         swNotifySummary.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
@@ -434,6 +445,7 @@ public class FragmentOptionsNotifications extends FragmentBase implements Shared
 
         swBadge.setChecked(prefs.getBoolean("badge", true));
         swUnseenIgnored.setChecked(prefs.getBoolean("unseen_ignored", false));
+        swNotifyKnown.setChecked(prefs.getBoolean("notify_known", false));
         swNotifySummary.setChecked(prefs.getBoolean("notify_summary", false));
         swNotifyRemove.setChecked(prefs.getBoolean("notify_remove", true));
         swNotifyClear.setChecked(prefs.getBoolean("notify_clear", false));
diff --git a/app/src/main/res/layout/fragment_options_notifications.xml b/app/src/main/res/layout/fragment_options_notifications.xml
index 0b391901f0..b0e19bf228 100644
--- a/app/src/main/res/layout/fragment_options_notifications.xml
+++ b/app/src/main/res/layout/fragment_options_notifications.xml
@@ -327,6 +327,17 @@
             app:layout_constraintTop_toBottomOf="@id/tvBadgeHint"
             app:switchPadding="12dp" />
 
+        <androidx.appcompat.widget.SwitchCompat
+            android:id="@+id/swNotifyKnown"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:text="@string/title_advanced_notify_known"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/swUnseenIgnored"
+            app:switchPadding="12dp" />
+
         <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/swNotifySummary"
             android:layout_width="0dp"
@@ -335,7 +346,7 @@
             android:text="@string/title_advanced_notify_summary"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/swUnseenIgnored"
+            app:layout_constraintTop_toBottomOf="@id/swNotifyKnown"
             app:switchPadding="12dp" />
 
         <androidx.appcompat.widget.SwitchCompat
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 9f98e7cb5e..c4125c891f 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -394,6 +394,7 @@
 
     <string name="title_advanced_badge">Show launcher icon with number of new messages</string>
     <string name="title_advanced_unseen_ignored">Let the number of new messages match the number of notifications</string>
+    <string name="title_advanced_notify_known">Show notifications for contacts only</string>
     <string name="title_advanced_notify_summary">Show summary notification only</string>
     <string name="title_advanced_notify_preview">Show message preview in notifications</string>
     <string name="title_advanced_notify_preview_all">Preview all text</string>