diff --git a/app/src/main/java/eu/faircode/email/AdapterAccount.java b/app/src/main/java/eu/faircode/email/AdapterAccount.java
index 87484fb313..47b7bbe08e 100644
--- a/app/src/main/java/eu/faircode/email/AdapterAccount.java
+++ b/app/src/main/java/eu/faircode/email/AdapterAccount.java
@@ -22,6 +22,7 @@ package eu.faircode.email;
 import android.annotation.TargetApi;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
+import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ -42,6 +43,7 @@ import android.widget.Button;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.widget.PopupMenu;
@@ -394,7 +396,12 @@ public class AdapterAccount extends RecyclerView.Adapter<AdapterAccount.ViewHold
                     Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS)
                             .putExtra(Settings.EXTRA_APP_PACKAGE, context.getPackageName())
                             .putExtra(Settings.EXTRA_CHANNEL_ID, EntityAccount.getNotificationChannelId(account.id));
-                    context.startActivity(intent);
+                    try {
+                        context.startActivity(intent);
+                    } catch (ActivityNotFoundException ex) {
+                        Log.w(ex);
+                        ToastEx.makeText(context, context.getString(R.string.title_no_viewer, intent), Toast.LENGTH_LONG).show();
+                    }
                 }
 
                 private void onActionCopy() {
diff --git a/app/src/main/java/eu/faircode/email/AdapterContact.java b/app/src/main/java/eu/faircode/email/AdapterContact.java
index b66506d0ba..117f5f197b 100644
--- a/app/src/main/java/eu/faircode/email/AdapterContact.java
+++ b/app/src/main/java/eu/faircode/email/AdapterContact.java
@@ -20,6 +20,7 @@ package eu.faircode.email;
 */
 
 import android.Manifest;
+import android.content.ActivityNotFoundException;
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
@@ -41,6 +42,7 @@ import android.view.View;
 import android.view.ViewGroup;
 import android.widget.ImageView;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.widget.PopupMenu;
@@ -276,8 +278,9 @@ public class AdapterContact extends RecyclerView.Adapter<AdapterContact.ViewHold
                 private void onActionShare() {
                     try {
                         context.startActivity(share);
-                    } catch (Throwable ex) {
-                        Log.unexpectedError(parentFragment.getParentFragmentManager(), ex);
+                    } catch (ActivityNotFoundException ex) {
+                        Log.w(ex);
+                        ToastEx.makeText(context, context.getString(R.string.title_no_viewer, share), Toast.LENGTH_LONG).show();
                     }
                 }
 
diff --git a/app/src/main/java/eu/faircode/email/AdapterFolder.java b/app/src/main/java/eu/faircode/email/AdapterFolder.java
index 39b7ef7b2e..5077e8a525 100644
--- a/app/src/main/java/eu/faircode/email/AdapterFolder.java
+++ b/app/src/main/java/eu/faircode/email/AdapterFolder.java
@@ -22,6 +22,7 @@ package eu.faircode.email;
 import android.app.Dialog;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
+import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
@@ -48,6 +49,7 @@ import android.widget.EditText;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -749,7 +751,12 @@ public class AdapterFolder extends RecyclerView.Adapter<AdapterFolder.ViewHolder
                     Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS)
                             .putExtra(Settings.EXTRA_APP_PACKAGE, context.getPackageName())
                             .putExtra(Settings.EXTRA_CHANNEL_ID, EntityFolder.getNotificationChannelId(folder.id));
-                    context.startActivity(intent);
+                    try {
+                        context.startActivity(intent);
+                    } catch (ActivityNotFoundException ex) {
+                        Log.w(ex);
+                        ToastEx.makeText(context, context.getString(R.string.title_no_viewer, intent), Toast.LENGTH_LONG).show();
+                    }
                 }
 
                 @RequiresApi(api = Build.VERSION_CODES.O)
diff --git a/app/src/main/java/eu/faircode/email/AdapterMessage.java b/app/src/main/java/eu/faircode/email/AdapterMessage.java
index 618eaafe31..fdf9e1521b 100644
--- a/app/src/main/java/eu/faircode/email/AdapterMessage.java
+++ b/app/src/main/java/eu/faircode/email/AdapterMessage.java
@@ -2648,6 +2648,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                         try {
                             context.startActivity((Intent) result);
                         } catch (ActivityNotFoundException ex) {
+                            Log.w(ex);
                             ToastEx.makeText(context, context.getString(R.string.title_no_viewer, result), Toast.LENGTH_LONG).show();
                         }
                     }
@@ -3215,7 +3216,12 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                     Intent intent = new Intent(Settings.ACTION_CHANNEL_NOTIFICATION_SETTINGS)
                             .putExtra(Settings.EXTRA_APP_PACKAGE, context.getPackageName())
                             .putExtra(Settings.EXTRA_CHANNEL_ID, channelId);
-                    context.startActivity(intent);
+                    try {
+                        context.startActivity(intent);
+                    } catch (ActivityNotFoundException ex) {
+                        Log.w(ex);
+                        ToastEx.makeText(context, context.getString(R.string.title_no_viewer, intent), Toast.LENGTH_LONG).show();
+                    }
                 }
 
                 private void onActionDeleteChannel() {
@@ -3315,7 +3321,12 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 Snackbar.make(parentFragment.getView(),
                         R.string.title_no_contacts, Snackbar.LENGTH_LONG).show();
             else
-                context.startActivity(insert);
+                try {
+                    context.startActivity(insert);
+                } catch (ActivityNotFoundException ex) {
+                    Log.w(ex);
+                    ToastEx.makeText(context, context.getString(R.string.title_no_viewer, insert), Toast.LENGTH_LONG).show();
+                }
         }
 
         private void onEditContact(String name, String email, Uri lookupUri) {
@@ -3332,7 +3343,12 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 Snackbar.make(parentFragment.getView(),
                         R.string.title_no_contacts, Snackbar.LENGTH_LONG).show();
             else
-                context.startActivity(edit);
+                try {
+                    context.startActivity(edit);
+                } catch (ActivityNotFoundException ex) {
+                    Log.w(ex);
+                    ToastEx.makeText(context, context.getString(R.string.title_no_viewer, edit), Toast.LENGTH_LONG).show();
+                }
         }
 
         private void onToggleMessage(TupleMessageEx message) {
@@ -4567,7 +4583,13 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 send.putExtra(Intent.EXTRA_STREAM, uri);
                 send.setType("message/rfc822");
                 send.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-                context.startActivity(send);
+
+                try {
+                    context.startActivity(send);
+                } catch (ActivityNotFoundException ex) {
+                    Log.w(ex);
+                    ToastEx.makeText(context, context.getString(R.string.title_no_viewer, send), Toast.LENGTH_LONG).show();
+                }
             }
         }
 
diff --git a/app/src/main/java/eu/faircode/email/FragmentOptionsMisc.java b/app/src/main/java/eu/faircode/email/FragmentOptionsMisc.java
index cb29303186..8e9b5cf511 100644
--- a/app/src/main/java/eu/faircode/email/FragmentOptionsMisc.java
+++ b/app/src/main/java/eu/faircode/email/FragmentOptionsMisc.java
@@ -326,6 +326,7 @@ public class FragmentOptionsMisc extends FragmentBase implements SharedPreferenc
                 try {
                     getContext().startActivity(app);
                 } catch (Throwable ex) {
+                    Log.w(ex);
                     ToastEx.makeText(getContext(), getString(R.string.title_no_viewer, app), Toast.LENGTH_LONG).show();
                 }
             }