diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 8a3a63b..a9d6af6 100755
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
       package="org.envaya.sms"
-      android:versionCode="15"
-      android:versionName="2.0.2">
+      android:versionCode="16"
+      android:versionName="2.0.3">
          
     <uses-sdk android:minSdkVersion="4" />
          
@@ -35,6 +35,9 @@
         <activity android:name=".ui.TestPhoneNumbers" android:label="EnvayaSMS : Test Phone Numbers">
         </activity>                
         
+        <activity android:name=".ui.IgnoredPhoneNumbers" android:label="EnvayaSMS : Ignored Phone Numbers">
+        </activity>                        
+        
         <activity android:name=".ui.MessagingInbox" android:label="EnvayaSMS : Forward Inbox">
         </activity>        
         
diff --git a/res/layout/add_test_phone_number.xml b/res/layout/add_phone_number.xml
similarity index 62%
rename from res/layout/add_test_phone_number.xml
rename to res/layout/add_phone_number.xml
index 8c2c8f8..7451d0a 100755
--- a/res/layout/add_test_phone_number.xml
+++ b/res/layout/add_phone_number.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<EditText  xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/add_test_sender_text"
+<EditText xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/add_phone_number_text"
     android:layout_width="fill_parent"
     android:inputType="phone"
     android:layout_height="wrap_content">                           
diff --git a/res/layout/ignored_phone_numbers.xml b/res/layout/ignored_phone_numbers.xml
new file mode 100755
index 0000000..3c4611d
--- /dev/null
+++ b/res/layout/ignored_phone_numbers.xml
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="fill_parent"
+    android:layout_height="fill_parent" android:background="#333333">
+        
+   <TextView
+       android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:padding="10sp"
+        android:text="@string/ignored_phone_numbers">                           
+   </TextView>                       
+    <CheckBox android:id="@+id/ignore_shortcodes"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content" 
+        android:onClick="ignoreShortcodesClicked"
+        android:text="Ignore all shortcodes"
+    />
+    <CheckBox android:id="@+id/ignore_non_numeric"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content" 
+        android:onClick="ignoreNonNumericClicked"
+        android:text="Ignore all non-numeric senders"
+    />    
+   <ListView android:id="@android:id/list"
+               android:layout_width="fill_parent"
+               android:layout_height="fill_parent"
+               android:layout_weight="1" />
+    <Button
+        android:id="@+id/add_phone_number"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:padding="10dp"
+        android:onClick="addIgnoredPhoneNumber"
+        android:text="Add Ignored Phone Number" />               
+
+</LinearLayout>
+  
\ No newline at end of file
diff --git a/res/layout/test_phone_number.xml b/res/layout/phone_number.xml
similarity index 100%
rename from res/layout/test_phone_number.xml
rename to res/layout/phone_number.xml
diff --git a/res/layout/test_phone_numbers.xml b/res/layout/test_phone_numbers.xml
index 2130614..adc602c 100755
--- a/res/layout/test_phone_numbers.xml
+++ b/res/layout/test_phone_numbers.xml
@@ -8,7 +8,7 @@
    android:layout_width="wrap_content"
     android:layout_height="wrap_content"
     android:padding="10sp"
-    android:text="@string/test_senders">                           
+    android:text="@string/test_phone_numbers">                           
    </TextView>                       
    
    <ListView android:id="@android:id/list"
@@ -17,12 +17,12 @@
                android:layout_weight="1" />
 
     <Button
-        android:id="@+id/add_test_phone_number"
+        android:id="@+id/add_phone_number"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:padding="10dp"
-        android:onClick="addTestSender"
-        android:text="Add Test Sender" />               
+        android:onClick="addTestPhoneNumber"
+        android:text="Add Test Phone Number" />               
 
 </LinearLayout>
   
\ No newline at end of file
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 79393e2..947b7d6 100755
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -9,8 +9,11 @@
     <string name="retry_now">Retry</string>
     <string name="forward_inbox">Fwd Inbox...</string>
     <string name='service_started'>New SMS will be forwarded to server</string>
-    <string name='test_senders'>When running EnvayaSMS in Test Mode, 
+    <string name='test_phone_numbers'>When running EnvayaSMS in Test Mode, 
 EnvayaSMS will only forward SMS messages from the phone numbers 
 listed below. (Incoming SMS messages from other phone numbers will be saved 
 in the normal Messaging inbox, and outgoing messages will be ignored.)</string>
+    <string name='ignored_phone_numbers'>
+EnvayaSMS will ignore SMS messages from the phone numbers listed below. 
+Incoming messages from these senders will be saved in the normal Messaging inbox.</string>
 </resources>
diff --git a/res/xml/prefs.xml b/res/xml/prefs.xml
index f849cba..f0815ad 100755
--- a/res/xml/prefs.xml
+++ b/res/xml/prefs.xml
@@ -56,11 +56,22 @@
     
     <CheckBoxPreference
             android:key="network_failover"
-            android:title="Network Failover"
+            android:title="Network failover"
             android:summaryOff="Do nothing if phone can't connect to server via Wi-Fi"
             android:summaryOn="Automatically switch to mobile data if phone can't connect to server via Wi-Fi"
     ></CheckBoxPreference>
     
+    <PreferenceScreen 
+        android:key="ignored_numbers" 
+        android:title="Ignored phones"
+        android:summary="Configure the phone numbers that EnvayaSMS will ignore"
+    >        
+       <intent 
+            android:action="android.intent.action.MAIN"
+            android:targetPackage="org.envaya.sms"
+            android:targetClass="org.envaya.sms.ui.IgnoredPhoneNumbers" />
+    </PreferenceScreen>    
+    
     <CheckBoxPreference
             android:key="test_mode"
             android:title="Test mode"
diff --git a/src/org/envaya/sms/App.java b/src/org/envaya/sms/App.java
index 4a48412..27f9305 100755
--- a/src/org/envaya/sms/App.java
+++ b/src/org/envaya/sms/App.java
@@ -430,6 +430,16 @@ public final class App extends Application {
     {
         return settings.getBoolean("keep_in_inbox", false);        
     }
+    
+    public boolean ignoreShortcodes()
+    {
+        return settings.getBoolean("ignore_shortcodes", true);
+    }
+    
+    public boolean ignoreNonNumeric()
+    {
+        return settings.getBoolean("ignore_non_numeric", true);
+    }
 
     public String getPassword() {
         return settings.getString("password", "");
@@ -551,70 +561,134 @@ public final class App extends Application {
         return mmsUtils;
     }
     
-    private List<String> testPhoneNumbers;
-    
-    public List<String> getTestPhoneNumbers()
-    {        
+    private List<String> testPhoneNumbers;    
+    public synchronized List<String> getTestPhoneNumbers()
+    {
         if (testPhoneNumbers == null)
         {          
-            testPhoneNumbers = new ArrayList<String>();
-            String phoneNumbersJson = settings.getString("test_phone_numbers", "");
-            
-            if (phoneNumbersJson.length() > 0)
-            {
-                try
-                {                                
-                    JSONArray arr = new JSONArray(phoneNumbersJson);
-                    int numSenders = arr.length();
-                    for (int i = 0; i < numSenders; i++)
-                    {                    
-                        testPhoneNumbers.add(arr.getString(i));                    
-                    }
-                }
-                catch (JSONException ex)
-                {
-                    logError("Error parsing test phone numbers", ex);
-                }            
-            }
+            testPhoneNumbers = loadStringListSetting("test_phone_numbers");
         }
         return testPhoneNumbers;
     }
     
-    public void addTestPhoneNumber(String phoneNumber)
+    public synchronized void addTestPhoneNumber(String phoneNumber)
     {
         List<String> phoneNumbers = getTestPhoneNumbers();
         log("Added test phone number: " + phoneNumber);
         phoneNumbers.add(phoneNumber);
-        saveTestPhoneNumbers(phoneNumbers);
+        saveStringListSetting("test_phone_numbers", phoneNumbers);
     }
     
-    public void removeTestPhoneNumber(String phoneNumber)
+    public synchronized void removeTestPhoneNumber(String phoneNumber)
     {
         List<String> phoneNumbers = getTestPhoneNumbers();
         phoneNumbers.remove(phoneNumber);
         log("Removed test phone number: " + phoneNumber);
-        saveTestPhoneNumbers(phoneNumbers);
+        saveStringListSetting("test_phone_numbers", phoneNumbers);
     }
     
-    private void saveTestPhoneNumbers(List<String> phoneNumbers)
+    private List<String> ignoredPhoneNumbers;    
+    public synchronized List<String> getIgnoredPhoneNumbers()
     {
-        settings.edit().putString("test_phone_numbers", 
-            new JSONArray(phoneNumbers).toString()
+        if (ignoredPhoneNumbers == null)
+        {          
+            ignoredPhoneNumbers = loadStringListSetting("ignored_phone_numbers");
+        }
+        return ignoredPhoneNumbers;
+    }
+    
+    public synchronized void addIgnoredPhoneNumber(String phoneNumber)
+    {
+        List<String> phoneNumbers = getIgnoredPhoneNumbers();
+        log("Added ignored phone number: " + phoneNumber);
+        phoneNumbers.add(phoneNumber);
+        saveStringListSetting("ignored_phone_numbers", phoneNumbers);
+    }
+    
+    public synchronized void removeIgnoredPhoneNumber(String phoneNumber)
+    {
+        List<String> phoneNumbers = getIgnoredPhoneNumbers();
+        phoneNumbers.remove(phoneNumber);
+        log("Removed ignored phone number: " + phoneNumber);
+        saveStringListSetting("ignored_phone_numbers", phoneNumbers);
+    }    
+    
+    public synchronized  void saveStringListSetting(String key, List<String> values)
+    {
+        settings.edit().putString(key, 
+            new JSONArray(values).toString()
         ).commit();
     }    
     
-    public boolean isTestPhoneNumber(String phoneNumber)
-    {            
-        for (String testNumber : getTestPhoneNumbers())
+    public synchronized void saveBooleanSetting(String key, boolean value)
+    {
+        settings.edit().putBoolean(key, value).commit();
+    }    
+    
+    private List<String> loadStringListSetting(String key)
+    {
+        List<String> values = new ArrayList<String>();
+        String valuesJson = settings.getString(key, "");
+
+        if (valuesJson.length() > 0)
         {
-            // handle inexactness due to various different ways of formatting numbers
-            if (testNumber.contains(phoneNumber) || phoneNumber.contains(testNumber))
+            try
+            {                                
+                JSONArray arr = new JSONArray(valuesJson);
+                int numSenders = arr.length();
+                for (int i = 0; i < numSenders; i++)
+                {                    
+                    values.add(arr.getString(i));                    
+                }
+            }
+            catch (JSONException ex)
             {
-                return true;
+                logError("Error parsing setting " + key, ex);
+            }            
+        }        
+        return values;
+    }
+    
+    public boolean isForwardablePhoneNumber(String phoneNumber)
+    {
+        if (isTestMode())
+        {
+            return getTestPhoneNumbers().contains(phoneNumber);
+        }        
+        
+        if (getIgnoredPhoneNumbers().contains(phoneNumber))
+        {
+            return false;
+        }
+        
+        int numDigits = 0;
+        int length = phoneNumber.length();
+
+        for (int i = 0; i < length; i++)
+        {
+            if (Character.isDigit(phoneNumber.charAt(i)))
+            {
+                numDigits++;
             }
         }        
-        return false;
-    }    
+        
+        if (numDigits == 0)
+        {
+            if (ignoreNonNumeric())
+            {
+                return false;
+            }
+        }
+        else if (numDigits < 7)
+        {
+            if (ignoreShortcodes())
+            {
+                return false;
+            }
+        }
+
+        return true;
+    }
     
     private HttpClient httpClient;
     
diff --git a/src/org/envaya/sms/CheckMmsInboxService.java b/src/org/envaya/sms/CheckMmsInboxService.java
index 1b5d6a8..8734a20 100755
--- a/src/org/envaya/sms/CheckMmsInboxService.java
+++ b/src/org/envaya/sms/CheckMmsInboxService.java
@@ -44,7 +44,7 @@ public class CheckMmsInboxService extends IntentService
                 mmsUtils.markOldMms(mms);                 
 
                 if (mms.isForwardable())
-                {                
+                {
                     app.inbox.forwardMessage(mms);                                    
                 }
                 else
diff --git a/src/org/envaya/sms/IncomingMessage.java b/src/org/envaya/sms/IncomingMessage.java
index 3623a52..26c16a3 100755
--- a/src/org/envaya/sms/IncomingMessage.java
+++ b/src/org/envaya/sms/IncomingMessage.java
@@ -40,38 +40,10 @@ public abstract class IncomingMessage extends QueuedMessage {
     {
         this.state = status;
     }    
-
+    
     public boolean isForwardable()
     {
-        if (app.isTestMode() && !app.isTestPhoneNumber(from))
-        {
-            return false;
-        }
-        
-        /* 
-         * Don't forward messages from shortcodes or users with 
-         * addresses like 'Vodacom' because they're likely to be 
-         * messages from network, or spam. At least for network 
-         * messages we should let them go in to the Messaging inbox 
-         * because the person managing  this phone needs to know 
-         * when they're out of credit, etc.
-         * 
-         * The minimum length of normal subscriber numbers doesn't 
-         * seem to  be specified, but in practice seems to be 
-         * at least 7 digits everywhere.
-         */        
-        int fromDigits = 0;
-        int fromLength = from.length();
-        
-        for (int i = 0; i < fromLength; i++)
-        {
-            if (Character.isDigit(from.charAt(i)))
-            {
-                fromDigits++;
-            }
-        }
-        
-        return fromDigits >= 7;
+        return app.isForwardablePhoneNumber(from);
     }
     
     public String getFrom()
diff --git a/src/org/envaya/sms/Outbox.java b/src/org/envaya/sms/Outbox.java
index 9c9c8fe..2ec53f2 100755
--- a/src/org/envaya/sms/Outbox.java
+++ b/src/org/envaya/sms/Outbox.java
@@ -143,12 +143,12 @@ public class Outbox {
             return;
         }        
         
-        if (app.isTestMode() && !app.isTestPhoneNumber(to))
+        if (!app.isForwardablePhoneNumber(to))
         {
             // this is mostly to prevent accidentally sending real messages to
-            // random people while testing...        
+            // random people while testing...
             notifyMessageStatus(sms, App.STATUS_FAILED,
-                    "Destination number is not in list of test senders");
+                    "Destination address is not allowed");
             return;
         }
         
diff --git a/src/org/envaya/sms/ui/IgnoredPhoneNumbers.java b/src/org/envaya/sms/ui/IgnoredPhoneNumbers.java
new file mode 100755
index 0000000..f66e2aa
--- /dev/null
+++ b/src/org/envaya/sms/ui/IgnoredPhoneNumbers.java
@@ -0,0 +1,131 @@
+package org.envaya.sms.ui;
+
+import android.app.AlertDialog;
+import android.app.ListActivity;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.CheckBox;
+import android.widget.EditText;
+import android.widget.ListView;
+import android.widget.TextView;
+import org.envaya.sms.App;
+import org.envaya.sms.R;
+
+public class IgnoredPhoneNumbers extends ListActivity {
+    
+    private App app;
+    
+    private CheckBox ignoreNonNumeric;
+    private CheckBox ignoreShortcodes;
+    
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);        
+        setContentView(R.layout.ignored_phone_numbers);           
+                
+        app = (App)getApplication();        
+     
+        ignoreNonNumeric = (CheckBox)findViewById(R.id.ignore_non_numeric);
+        ignoreNonNumeric.setChecked(app.ignoreNonNumeric());
+        
+        ignoreShortcodes = (CheckBox)findViewById(R.id.ignore_shortcodes);
+        ignoreShortcodes.setChecked(app.ignoreShortcodes());        
+        
+        ListView lv = getListView();
+         lv.setOnItemClickListener(new OnItemClickListener() {
+            public void onItemClick(AdapterView<?> parent, View view,
+                int position, long id) 
+            {                
+                final String phoneNumber = ((TextView) view).getText().toString();
+                
+                new AlertDialog.Builder(IgnoredPhoneNumbers.this)
+                    .setTitle("Remove Ignored Phone")
+                    .setMessage("Do you want to remove "+phoneNumber
+                        +" from the list of ignored phone numbers?")
+                    .setPositiveButton("OK", 
+                        new OnClickListener() {
+                            public void onClick(DialogInterface dialog, int which)
+                            {
+                                app.removeIgnoredPhoneNumber(phoneNumber);
+                                updateIgnoredPhoneNumbers();
+                                dialog.dismiss();
+                            }
+                        }
+                    )
+                    .setNegativeButton("Cancel", 
+                        new OnClickListener() {
+                            public void onClick(DialogInterface dialog, int which)
+                            {
+                                dialog.dismiss();
+                            }
+                        }
+                    )
+                    .show();
+            }
+          });        
+                
+        updateIgnoredPhoneNumbers();
+    }
+    
+    public void updateIgnoredPhoneNumbers()
+    {                
+        String[] ignoredNumbers = app.getIgnoredPhoneNumbers().toArray(new String[]{});
+        
+        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, 
+                R.layout.phone_number, 
+                ignoredNumbers);
+        
+        setListAdapter(arrayAdapter);                
+    }
+    
+    public void ignoreShortcodesClicked(View v)
+    {   
+        boolean checked = ignoreShortcodes.isChecked();
+        app.log("Ignore all shortcodes set to " + (checked ? "ON" : "OFF"));
+        app.saveBooleanSetting("ignore_shortcodes", checked);
+    }
+
+    public void ignoreNonNumericClicked(View v)
+    {   
+        boolean checked = ignoreNonNumeric.isChecked();
+        app.log("Ignore all non-numeric senders set to " + (checked ? "ON" : "OFF"));
+        app.saveBooleanSetting("ignore_non_numeric", checked);
+    }
+        
+    public void addIgnoredPhoneNumber(View v)
+    {   
+        LayoutInflater factory = LayoutInflater.from(this);
+        final EditText textEntryView = 
+                (EditText)factory.inflate(R.layout.add_phone_number, null);
+        
+        new AlertDialog.Builder(this)
+            .setTitle("Add Ignored Phone")
+            .setMessage("Enter the phone number that you want to ignore:")
+            .setView(textEntryView)
+            .setPositiveButton("OK", 
+                new OnClickListener() {
+                    public void onClick(DialogInterface dialog, int which)
+                    {
+                        app.addIgnoredPhoneNumber(textEntryView.getText().toString());
+                        updateIgnoredPhoneNumbers();
+                        dialog.dismiss();
+                    }
+                }
+            )
+            .setNegativeButton("Cancel", 
+                new OnClickListener() {
+                    public void onClick(DialogInterface dialog, int which)
+                    {
+                        dialog.dismiss();
+                    }
+                }
+            )
+            .show();
+    }        
+}
diff --git a/src/org/envaya/sms/ui/TestPhoneNumbers.java b/src/org/envaya/sms/ui/TestPhoneNumbers.java
index 44641f5..847f5df 100755
--- a/src/org/envaya/sms/ui/TestPhoneNumbers.java
+++ b/src/org/envaya/sms/ui/TestPhoneNumbers.java
@@ -68,17 +68,17 @@ public class TestPhoneNumbers extends ListActivity {
         String[] senders = app.getTestPhoneNumbers().toArray(new String[]{});
         
         ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this, 
-                R.layout.test_phone_number, 
+                R.layout.phone_number, 
                 senders);
         
         setListAdapter(arrayAdapter);                
     }
     
-    public void addTestSender(View v)
+    public void addTestPhoneNumber(View v)
     {   
         LayoutInflater factory = LayoutInflater.from(this);
         final EditText textEntryView = 
-                (EditText)factory.inflate(R.layout.add_test_phone_number, null);
+                (EditText)factory.inflate(R.layout.add_phone_number, null);
         
         new AlertDialog.Builder(this)
             .setTitle("Add Test Phone")