Added option to enable showing authentication errors

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -143,7 +143,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
     private boolean preview;
     private boolean autohtml;
     private boolean autoimages;
-    private boolean paranoid;
+    private boolean authentication;
     private boolean debug;
 
     private float textSize;
@@ -507,7 +507,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                             Boolean.FALSE.equals(message.spf) ||
                             Boolean.FALSE.equals(message.dmarc)
                             ? colorAccent : Color.TRANSPARENT);
-            vwStatus.setVisibility(paranoid ? View.VISIBLE : View.GONE);
+            vwStatus.setVisibility(authentication ? View.VISIBLE : View.GONE);
 
             // Expander
             boolean expanded = (viewType == ViewType.THREAD && properties.getValue("expanded", message.id));
@@ -2952,7 +2952,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
         this.preview = prefs.getBoolean("preview", false);
         this.autohtml = prefs.getBoolean("autohtml", false);
         this.autoimages = prefs.getBoolean("autoimages", false);
-        this.paranoid = prefs.getBoolean("paranoid", true);
+        this.authentication = prefs.getBoolean("authentication", false);
         this.debug = prefs.getBoolean("debug", false);
 
         this.textSize = Helper.getTextSize(context, zoom);

app/src/main/java/eu/faircode/email/FragmentOptions.java

@@ -105,6 +105,7 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
     private SwitchCompat swLight;
     private Button btnSound;
 
+    private SwitchCompat swAuthentication;
     private SwitchCompat swParanoid;
     private SwitchCompat swEnglish;
     private SwitchCompat swUpdates;
@@ -117,7 +118,7 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
             "startup", "date", "threading", "avatars", "identicons", "name_email", "subject_italic", "flags", "preview",
             "addresses", "monospaced", "autohtml", "autoimages", "actionbar",
             "pull", "swipenav", "autoexpand", "autoclose", "autonext",
-            "debug"
+            "authentication", "debug"
     };
 
     private final static String[] ADVANCED_OPTIONS = new String[]{
@@ -128,7 +129,7 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
             "pull", "swipenav", "autoexpand", "autoclose", "autonext", "collapse", "autoread", "automove",
             "autoresize", "sender", "autosend",
             "notify_preview", "search_local", "light", "sound",
-            "paranoid", "english", "updates", "debug",
+            "authentication", "paranoid", "english", "updates", "debug",
             "first", "why", "last_update_check", "app_support", "message_swipe", "message_select", "folder_actions", "folder_sync",
             "edit_ref_confirmed", "show_html_confirmed", "show_images_confirmed", "print_html_confirmed", "show_organization", "style_toolbar"
     };
@@ -184,6 +185,7 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
         swLight = view.findViewById(R.id.swLight);
         btnSound = view.findViewById(R.id.btnSound);
 
+        swAuthentication = view.findViewById(R.id.swAuthentication);
         swParanoid = view.findViewById(R.id.swParanoid);
         swEnglish = view.findViewById(R.id.swEnglish);
         swUpdates = view.findViewById(R.id.swUpdates);
@@ -251,6 +253,13 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
             }
         });
 
+        swAuthentication.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
+                prefs.edit().putBoolean("authentication", checked).apply();
+            }
+        });
+
         swParanoid.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
@@ -656,6 +665,7 @@ public class FragmentOptions extends FragmentBase implements SharedPreferences.O
         swNotifyPreview.setEnabled(Helper.isPro(getContext()));
         swSearchLocal.setChecked(prefs.getBoolean("search_local", false));
         swLight.setChecked(prefs.getBoolean("light", false));
+        swAuthentication.setChecked(prefs.getBoolean("authentication", false));
         swParanoid.setChecked(prefs.getBoolean("paranoid", true));
         swEnglish.setChecked(prefs.getBoolean("english", false));
         swUpdates.setChecked(prefs.getBoolean("updates", true));

app/src/main/res/layout/fragment_options.xml

@@ -853,6 +853,18 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/swEnglish" />
 
+        <androidx.appcompat.widget.SwitchCompat
+            android:id="@+id/swAuthentication"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="12dp"
+            android:layout_marginTop="12dp"
+            android:layout_marginEnd="12dp"
+            android:text="@string/title_advanced_authentication"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/tvEnglishHint"
+            app:switchPadding="12dp" />
+
         <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/swParanoid"
             android:layout_width="match_parent"
@@ -862,7 +874,7 @@
             android:layout_marginEnd="12dp"
             android:text="@string/title_advanced_paranoid"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/tvEnglishHint"
+            app:layout_constraintTop_toBottomOf="@id/swAuthentication"
             app:switchPadding="12dp" />
 
         <androidx.appcompat.widget.SwitchCompat

app/src/main/res/values/strings.xml

@@ -194,6 +194,7 @@
     <string name="title_advanced_light">Use notification light</string>
     <string name="title_advanced_sound">Select notification sound</string>
     <string name="title_advanced_english">Force English language</string>
+    <string name="title_advanced_authentication">Show a warning when the receiving server could not authenticate the message</string>
     <string name="title_advanced_paranoid">Extra privacy features</string>
     <string name="title_advanced_updates">Check for updates</string>
     <string name="title_advanced_debug">Debug mode</string>