diff --git a/app/src/main/java/eu/faircode/email/ActivityView.java b/app/src/main/java/eu/faircode/email/ActivityView.java
index cdaba0d015..7fead0310d 100644
--- a/app/src/main/java/eu/faircode/email/ActivityView.java
+++ b/app/src/main/java/eu/faircode/email/ActivityView.java
@@ -1589,6 +1589,9 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
                             long id = args.getLong("id");
                             Uri uri = args.getParcelable("uri");
 
+                            if ("file".equals(uri.getScheme()))
+                                throw new IllegalArgumentException(context.getString(R.string.title_no_stream));
+
                             File file = EntityAttachment.getFile(context, id);
 
                             ParcelFileDescriptor pfd = null;
@@ -1601,9 +1604,8 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
 
                                 byte[] buffer = new byte[ATTACHMENT_BUFFER_SIZE];
                                 int read;
-                                while ((read = fis.read(buffer)) != -1) {
+                                while ((read = fis.read(buffer)) != -1)
                                     fos.write(buffer, 0, read);
-                                }
                             } finally {
                                 try {
                                     if (pfd != null)
@@ -1635,7 +1637,10 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
 
                         @Override
                         protected void onException(Bundle args, Throwable ex) {
-                            Helper.unexpectedError(ActivityView.this, ActivityView.this, ex);
+                            if (ex instanceof IllegalArgumentException)
+                                Snackbar.make(getVisibleView(), ex.getMessage(), Snackbar.LENGTH_LONG).show();
+                            else
+                                Helper.unexpectedError(ActivityView.this, ActivityView.this, ex);
                         }
                     }.load(this, args);
                 }
diff --git a/app/src/main/java/eu/faircode/email/FragmentCompose.java b/app/src/main/java/eu/faircode/email/FragmentCompose.java
index 82ed3d0ebc..db21b362ed 100644
--- a/app/src/main/java/eu/faircode/email/FragmentCompose.java
+++ b/app/src/main/java/eu/faircode/email/FragmentCompose.java
@@ -80,7 +80,6 @@ import java.io.BufferedOutputStream;
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
-import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
@@ -882,7 +881,7 @@ public class FragmentCompose extends FragmentEx {
             @Override
             protected void onException(Bundle args, Throwable ex) {
                 // External app sending absolute file
-                if (ex instanceof FileNotFoundException)
+                if (ex instanceof IllegalArgumentException)
                     Snackbar.make(view, ex.getMessage(), Snackbar.LENGTH_LONG).show();
                 else
                     Helper.unexpectedError(getContext(), getViewLifecycleOwner(), ex);
@@ -967,6 +966,9 @@ public class FragmentCompose extends FragmentEx {
 
     private static EntityAttachment addAttachment(Context context, long id, Uri uri,
                                                   boolean image) throws IOException {
+        if ("file".equals(uri.getScheme()))
+            throw new IllegalArgumentException(context.getString(R.string.title_no_stream));
+
         EntityAttachment attachment = new EntityAttachment();
 
         String name = null;
@@ -1518,8 +1520,7 @@ public class FragmentCompose extends FragmentEx {
 
         @Override
         protected void onException(Bundle args, Throwable ex) {
-            // External app sending absolute file
-            if (ex instanceof FileNotFoundException)
+            if (ex instanceof IllegalArgumentException)
                 Snackbar.make(view, ex.getMessage(), Snackbar.LENGTH_LONG).show();
             else
                 Helper.unexpectedError(getContext(), getViewLifecycleOwner(), ex);
diff --git a/app/src/main/java/eu/faircode/email/FragmentSetup.java b/app/src/main/java/eu/faircode/email/FragmentSetup.java
index 71810ff081..a010d332bf 100644
--- a/app/src/main/java/eu/faircode/email/FragmentSetup.java
+++ b/app/src/main/java/eu/faircode/email/FragmentSetup.java
@@ -609,6 +609,9 @@ public class FragmentSetup extends FragmentEx {
                 Uri uri = args.getParcelable("uri");
                 String password = args.getString("password");
 
+                if ("file".equals(uri.getScheme()))
+                    throw new IllegalArgumentException(context.getString(R.string.title_no_stream));
+
                 OutputStream out = null;
                 try {
                     Log.i(Helper.TAG, "Writing URI=" + uri);
@@ -691,7 +694,10 @@ public class FragmentSetup extends FragmentEx {
 
             @Override
             protected void onException(Bundle args, Throwable ex) {
-                Helper.unexpectedError(getContext(), getViewLifecycleOwner(), ex);
+                if (ex instanceof IllegalArgumentException)
+                    Snackbar.make(view, ex.getMessage(), Snackbar.LENGTH_LONG).show();
+                else
+                    Helper.unexpectedError(getContext(), getViewLifecycleOwner(), ex);
             }
         }.load(this, args);
     }
@@ -705,9 +711,11 @@ public class FragmentSetup extends FragmentEx {
             @Override
             protected Void onLoad(Context context, Bundle args) throws Throwable {
                 Uri uri = args.getParcelable("uri");
-
                 String password = args.getString("password");
 
+                if ("file".equals(uri.getScheme()))
+                    throw new IllegalArgumentException(context.getString(R.string.title_no_stream));
+
                 InputStream in = null;
                 try {
                     Log.i(Helper.TAG, "Reading URI=" + uri);
@@ -826,6 +834,8 @@ public class FragmentSetup extends FragmentEx {
             protected void onException(Bundle args, Throwable ex) {
                 if (ex.getCause() instanceof BadPaddingException)
                     Snackbar.make(view, R.string.title_setup_password_invalid, Snackbar.LENGTH_LONG).show();
+                else if (ex instanceof IllegalArgumentException)
+                    Snackbar.make(view, ex.getMessage(), Snackbar.LENGTH_LONG).show();
                 else
                     Helper.unexpectedError(getContext(), getViewLifecycleOwner(), ex);
             }
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 8c79fa7521..22eafd43af 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -262,6 +262,7 @@
     <string name="title_no_answers">No reply templates defined</string>
     <string name="title_no_viewer">No viewer app available for %1$s</string>
     <string name="title_no_saf">Storage access framework not available</string>
+    <string name="title_no_stream">An outdated app sent a file path instead of a file stream</string>
     <string name="title_no_contacts">Contact picker not available</string>
     <string name="title_attachment_saved">Attachment saved</string>
     <string name="title_attachment_unavailable">Some attachments are not downloaded and will not be added, continue?</string>