diff --git a/de.systopia.civiproxy/CRM/Admin/Form/Setting/ProxySettings.php b/de.systopia.civiproxy/CRM/Admin/Form/Setting/ProxySettings.php
index 233ddfc..e5a33cf 100644
--- a/de.systopia.civiproxy/CRM/Admin/Form/Setting/ProxySettings.php
+++ b/de.systopia.civiproxy/CRM/Admin/Form/Setting/ProxySettings.php
@@ -16,7 +16,7 @@ class CRM_Admin_Form_Setting_ProxySettings extends CRM_Admin_Form_Setting
     $this->addElement('text', 'proxy_url', ts('Proxy URL'), array('disabled' => 'disabled'));
     $this->addElement('static', 'proxy_version', ts('Proxy version'));
 
-    $this->addElement('text', 'civimail_external_optout', ts('CiviMail: External opt-out page'), array('disabled' => 'disabled'));
+    $this->addElement('text', 'custom_mailing_base', ts('Custom Subscribe/Unsubscribe Pages'), array('disabled' => 'disabled'));
 
     $this->addButtons(array(
       array('type' => 'next', 'name' => ts('Save'), 'isDefault' => TRUE),
@@ -28,7 +28,7 @@ class CRM_Admin_Form_Setting_ProxySettings extends CRM_Admin_Form_Setting
 
   function addRules() {
     $this->addRule('proxy_url', ts('This may only contain a valid URL'), 'onlyValidURL');
-    $this->addRule('civimail_external_optout', ts('This may only contain a valid URL'), 'onlyValidURL');
+    $this->addRule('custom_mailing_base', ts('This may only contain a valid URL'), 'onlyValidURL');
   }
 
   function preProcess() {
@@ -51,7 +51,7 @@ class CRM_Admin_Form_Setting_ProxySettings extends CRM_Admin_Form_Setting
     $this->setDefaults(array(
         'proxy_url'     => $proxyUrl,
         'proxy_version' => $proxyVersion, // watch out, this might contain an error message
-        'civimail_external_optout' => CRM_Core_BAO_Setting::getItem('CiviProxy Settings', 'civimail_extoptout')
+        'custom_mailing_base' => CRM_Core_BAO_Setting::getItem('CiviProxy Settings', 'custom_mailing_base')
       ));
   }
 
@@ -66,8 +66,13 @@ class CRM_Admin_Form_Setting_ProxySettings extends CRM_Admin_Form_Setting
     if (isset($values['proxy_url'])) {
       CRM_Core_BAO_Setting::setItem($values['proxy_url'],'CiviProxy Settings', 'proxy_url');
     }
-    if (isset($values['civimail_external_optout'])) {
-      CRM_Core_BAO_Setting::setItem($values['civimail_external_optout'],'CiviProxy Settings', 'civimail_extoptout');
+    if (isset($values['custom_mailing_base'])) {
+      // check if it is simply default ({$proxy_url}/mailing)
+      if ($values['custom_mailing_base'] == $values['proxy_url'] . '/mailing') {
+        // ...in which case we'll simply set it to ''
+        $values['custom_mailing_base'] = '';
+      }
+      CRM_Core_BAO_Setting::setItem($values['custom_mailing_base'],'CiviProxy Settings', 'custom_mailing_base');
     }
 
     // give feedback to user
diff --git a/de.systopia.civiproxy/civiproxy.php b/de.systopia.civiproxy/civiproxy.php
index dd597d7..f77b589 100644
--- a/de.systopia.civiproxy/civiproxy.php
+++ b/de.systopia.civiproxy/civiproxy.php
@@ -16,15 +16,27 @@ function civiproxy_civicrm_alterMailParams( &$params, $context ) {
   $proxy_base  = CRM_Core_BAO_Setting::getItem('CiviProxy Settings', 'proxy_url');
 
   // fields to replace:
-  $external_urls  = array('url.php', 'open.php');
   $fields2replace = array('html', 'text');
   foreach ($fields2replace as $field) {
     $value = $params[$field];
+
+    // General external functions
     $value = preg_replace("#{$system_base}sites/all/modules/civicrm/extern/url.php#i",  $proxy_base.'/url.php',      $value);
     $value = preg_replace("#{$system_base}sites/all/modules/civicrm/extern/open.php#i", $proxy_base.'/open.php',     $value);
     $value = preg_replace("#{$system_base}sites/default/files/civicrm/persist/#i",      $proxy_base.'/file.php?id=', $value);
-    $value = preg_replace("#{$system_base}civicrm/mailing/view#i",                      $proxy_base.'/mail.php',     $value);
-    $value = preg_replace("#{$system_base}civicrm/mailing/optout#i",                    $proxy_base.'/index.php',     $value);
+
+    // Mailing related functions
+    $value = preg_replace("#{$system_base}civicrm/mailing/view#i",                      $proxy_base.'/mailing/mail.php', $value);
+    $custom_mailing_base = CRM_Core_BAO_Setting::getItem('CiviProxy Settings', 'custom_mailing_base');
+    foreach ($other_mailing_functions as $function) {
+      if (empty($custom_mailing_base)) {
+        $new_url = "{$proxy_base}/mailing/{$function}.php";
+      } else {
+        $new_url = "{$custom_mailing_base}/{$function}.php";
+      }
+      $value = preg_replace("#{$system_base}civicrm/mailing/{$function}#i", $new_url, $value);
+    }
+
     $params[$field] = $value;
   }
 }
diff --git a/de.systopia.civiproxy/info.xml b/de.systopia.civiproxy/info.xml
index 4fac229..fbb94d1 100644
--- a/de.systopia.civiproxy/info.xml
+++ b/de.systopia.civiproxy/info.xml
@@ -9,7 +9,7 @@
     <email>endres@systopia.de</email>
   </maintainer>
   <releaseDate></releaseDate>
-  <version>0.2</version>
+  <version>0.3</version>
   <develStage>alpha</develStage>
   <compatibility>
     <ver>4.4</ver>
diff --git a/de.systopia.civiproxy/settings/civiproxy.setting.php b/de.systopia.civiproxy/settings/civiproxy.setting.php
index c46f6a1..19e8665 100644
--- a/de.systopia.civiproxy/settings/civiproxy.setting.php
+++ b/de.systopia.civiproxy/settings/civiproxy.setting.php
@@ -16,7 +16,7 @@ return array(
     'is_domain' => 1,
     'is_contact' => 0,
     'description' => 'Enables or disables the proxy',
-    'help_text' => 'TODO',
+    'help_text' => '',
   ),
   'proxy_url' => array(
     'group_name' => 'CiviProxy Settings',
@@ -28,7 +28,7 @@ return array(
     'is_domain' => 1,
     'is_contact' => 0,
     'description' => 'The URL from which the proxy will be available for requests',
-    'help_text' => 'TODO',
+    'help_text' => '',
   ),
   'proxy_version' => array(
     'group_name' => 'CiviProxy Settings',
@@ -40,6 +40,18 @@ return array(
     'is_domain' => 1,
     'is_contact' => 0,
     'description' => 'The version of the currently selected proxy',
-    'help_text' => 'TODO',
+    'help_text' => '',
+  ),
+  'custom_mailing_base' => array(
+    'group_name' => 'CiviProxy Settings',
+    'group' => 'de.systopia',
+    'name' => 'custom_mailing_base',
+    'type' => 'String',
+    'default' => "",
+    'add' => '4.3',
+    'is_domain' => 1,
+    'is_contact' => 0,
+    'description' => 'The URL can override the proxy for custom designed mailing subscribe/unsubscribe pages',
+    'help_text' => '',
   ),
  );
diff --git a/de.systopia.civiproxy/templates/CRM/Admin/Form/Setting/ProxySettings.hlp b/de.systopia.civiproxy/templates/CRM/Admin/Form/Setting/ProxySettings.hlp
index 1db0b3a..9db8bce 100644
--- a/de.systopia.civiproxy/templates/CRM/Admin/Form/Setting/ProxySettings.hlp
+++ b/de.systopia.civiproxy/templates/CRM/Admin/Form/Setting/ProxySettings.hlp
@@ -16,8 +16,8 @@
 </p>
 {/htxt}
 
-{htxt id='id-extoptout-url'}
+{htxt id='id-custom-mailing-base'}
 <p>
-  {ts}TODO #2{/ts}
+  {ts}TADDAAAA{/ts}
 </p>
 {/htxt}
diff --git a/de.systopia.civiproxy/templates/CRM/Admin/Form/Setting/ProxySettings.tpl b/de.systopia.civiproxy/templates/CRM/Admin/Form/Setting/ProxySettings.tpl
index a331ade..21f334b 100644
--- a/de.systopia.civiproxy/templates/CRM/Admin/Form/Setting/ProxySettings.tpl
+++ b/de.systopia.civiproxy/templates/CRM/Admin/Form/Setting/ProxySettings.tpl
@@ -20,21 +20,21 @@
         </div>
     </div>
   </div>
-  {* ==== advanced settings disabled ========
+  <br/>
   <div>
-    <h3>{ts}Advanced Settings{/ts}</h3>
+    <h3>{ts}Mailing Settings{/ts}</h3>
     <div>
       <div>
-          <table id="component_settings" class="no-border">
+          <table id="core_settings" class="no-border">
             <tr>
-              <td class="label">{$form.civimail_external_optout.label} <a onclick='CRM.help("{ts}CiviMail: External opt-out page{/ts}", {literal}{"id":"id-extoptout-url","file":"CRM\/Admin\/Form\/Setting\/ProxySettings"}{/literal}); return false;' href="#" title="{ts}Help{/ts}" class="helpicon">&nbsp;</a></td>
-              <td>{$form.civimail_external_optout.html}</td>
+              <td class="label">{$form.custom_mailing_base.label}&nbsp;<a onclick='CRM.help("{ts}CiviMail: Custom pages{/ts}", {literal}{"id":"id-custom-mailing-base","file":"CRM\/Admin\/Form\/Setting\/ProxySettings"}{/literal}); return false;' href="#" title="{ts}Help{/ts}" class="helpicon">&nbsp;</a></td>
+              <td>{$form.custom_mailing_base.html}</td>
             </tr>
           </table>
         </div>
     </div>
   </div>
-  ==== advanced settings disabled ======== *}
+  <br/>
   <div class="crm-submit-buttons">{include file="CRM/common/formButtons.tpl" location="bottom"}</div>
 </div>
 
@@ -42,24 +42,29 @@
 <script type="text/javascript">
   function enableInput() {
     cj('#proxy_url').attr('disabled',!this.checked);
-    cj('#civimail_external_optout').attr('disabled', !this.checked);
+    cj('#custom_mailing_base').attr('disabled', !this.checked);
   }
 
   function enableInputGlobal() {
     var is_enabled = cj('#proxy_enabled').attr('checked') == 'checked';
     cj('#proxy_url').attr('disabled', !is_enabled);
-    cj('#civimail_external_optout').attr('disabled', !is_enabled);
+    cj('#custom_mailing_base').attr('disabled', !is_enabled);
   }
 
   (function(cj) {
     cj('#proxy_enabled').click(enableInput);
     enableInputGlobal();
 
+    // set the default value to {$proxy_url}/mailing
+    if (cj("#custom_mailing_base").val().length == 0) {
+      cj("#custom_mailing_base").val(cj("#proxy_url").val() + '/mailing');
+    } 
+
   })(cj);
 </script>
 
 <style type="text/css">
-  #proxy_url, #civimail_external_optout {
+  #proxy_url, #custom_mailing_base {
     width: 350px;
   }
 
diff --git a/proxy/config.php b/proxy/config.php
index e9f7618..fb67519 100644
--- a/proxy/config.php
+++ b/proxy/config.php
@@ -25,13 +25,17 @@ $target_civicrm = 'https://your.civicrm.installation.org';
  ****************************************************************/
 
 // default paths, override if you want. Set to NULL to disable
-$target_rest     = $target_civicrm . '/sites/all/modules/civicrm/extern/rest.php';
-$target_url      = $target_civicrm . '/sites/all/modules/civicrm/extern/url.php';
-$target_open     = $target_civicrm . '/sites/all/modules/civicrm/extern/open.php';
-$target_file     = $target_civicrm . '/sites/default/files/civicrm/persist/';
-$target_mail     = $target_civicrm . '/civicrm/mailing/view';
+$target_rest      = $target_civicrm . '/sites/all/modules/civicrm/extern/rest.php';
+$target_url       = $target_civicrm . '/sites/all/modules/civicrm/extern/url.php';
+$target_open      = $target_civicrm . '/sites/all/modules/civicrm/extern/open.php';
+$target_file      = $target_civicrm . '/sites/default/files/civicrm/persist/';
+$target_mail_view = $target_civicrm . '/civicrm/mailing/view';
 
-// CAREFUL: only enable on debug systems. Will log all queries to given PUBLIC file
+// target_mail_base CANNOT be "$target_civicrm . '/civicrm/mailing'", 
+//  since these pages cannot be easily proxied.
+$target_mail_base = NULL;
+
+// CAREFUL: only enable temporarily on debug systems. Will log all queries to given PUBLIC file
 $debug           = NULL; //'debug.log';
 
 
@@ -68,6 +72,7 @@ $file_cache_include = array(
  **                   REST API OPTIONS                         **
  ****************************************************************/
 $rest_allowed_actions = array(
+  // this is an example:
   'Contact' => array(
       'getsingle'      => array(
                             'email' => 'string'
diff --git a/proxy/mailing/confirm.php b/proxy/mailing/confirm.php
new file mode 100644
index 0000000..d0a3b15
--- /dev/null
+++ b/proxy/mailing/confirm.php
@@ -0,0 +1,30 @@
+<?php
+/*--------------------------------------------------------+
+| SYSTOPIA CiviProxy                                      |
+|  a simple proxy solution for external access to CiviCRM |
+| Copyright (C) 2015 SYSTOPIA                             |
+| Author: B. Endres (endres -at- systopia.de)             |
+| http://www.systopia.de/                                 |
++---------------------------------------------------------*/
+
+require_once "../config.php";
+require_once "../proxy.php";
+
+// see if mail open tracking is enabled
+if (!$target_mail_base) civiproxy_http_error("Feature disabled", 405);
+
+// basic check
+civiproxy_security_check('mail-confirm');
+
+// basic restraints
+$valid_parameters = array(    'sid'          => 'int',
+                              'cid'          => 'int', 
+                              'h'            => 'hex');
+$parameters = civiproxy_get_parameters($valid_parameters);
+
+// check if parameters specified
+if (empty($parameters['sid'])) civiproxy_http_error("Missing/invalid parameter 'sid'.");
+if (empty($parameters['cid'])) civiproxy_http_error("Missing/invalid parameter 'cid'.");
+if (empty($parameters['h']))   civiproxy_http_error("Missing/invalid parameter 'h'.");
+
+civiproxy_redirect($target_mail_base . '/confirm', $parameters);
diff --git a/proxy/mail.php b/proxy/mailing/mail.php
similarity index 81%
rename from proxy/mail.php
rename to proxy/mailing/mail.php
index 0ba51a8..da2d0e3 100644
--- a/proxy/mail.php
+++ b/proxy/mailing/mail.php
@@ -7,14 +7,14 @@
 | http://www.systopia.de/                                 |
 +---------------------------------------------------------*/
 
-require_once "config.php";
-require_once "proxy.php";
+require_once "../config.php";
+require_once "../proxy.php";
 
 // see if mail open tracking is enabled
-if (!$target_mail) civiproxy_http_error("Feature disabled", 405);
+if (!$target_mail_view) civiproxy_http_error("Feature disabled", 405);
 
 // basic check
-civiproxy_security_check('viewmail');
+civiproxy_security_check('mail-view');
 
 // basic restraints
 $valid_parameters = array(  'id'   => 'int'  );
diff --git a/proxy/mailing/resubscribe.php b/proxy/mailing/resubscribe.php
new file mode 100644
index 0000000..7a0f8f0
--- /dev/null
+++ b/proxy/mailing/resubscribe.php
@@ -0,0 +1,30 @@
+<?php
+/*--------------------------------------------------------+
+| SYSTOPIA CiviProxy                                      |
+|  a simple proxy solution for external access to CiviCRM |
+| Copyright (C) 2015 SYSTOPIA                             |
+| Author: B. Endres (endres -at- systopia.de)             |
+| http://www.systopia.de/                                 |
++---------------------------------------------------------*/
+
+require_once "../config.php";
+require_once "../proxy.php";
+
+// see if mail open tracking is enabled
+if (!$target_mail_base) civiproxy_http_error("Feature disabled", 405);
+
+// basic check
+civiproxy_security_check('mail-resubscribe');
+
+// basic restraints
+$valid_parameters = array(    'jid'          => 'int',
+                              'qid'          => 'int', 
+                              'h'            => 'hex');
+$parameters = civiproxy_get_parameters($valid_parameters);
+
+// check if parameters specified
+if (empty($parameters['jid'])) civiproxy_http_error("Missing/invalid parameter 'jid'.");
+if (empty($parameters['qid'])) civiproxy_http_error("Missing/invalid parameter 'qid'.");
+if (empty($parameters['h']))   civiproxy_http_error("Missing/invalid parameter 'h'.");
+
+civiproxy_redirect($target_mail_base . '/resubscribe', $parameters);
diff --git a/proxy/mailing/subscribe.php b/proxy/mailing/subscribe.php
new file mode 100644
index 0000000..903eda3
--- /dev/null
+++ b/proxy/mailing/subscribe.php
@@ -0,0 +1,21 @@
+<?php
+/*--------------------------------------------------------+
+| SYSTOPIA CiviProxy                                      |
+|  a simple proxy solution for external access to CiviCRM |
+| Copyright (C) 2015 SYSTOPIA                             |
+| Author: B. Endres (endres -at- systopia.de)             |
+| http://www.systopia.de/                                 |
++---------------------------------------------------------*/
+
+require_once "../config.php";
+require_once "../proxy.php";
+
+// see if mail open tracking is enabled
+if (!$target_mail_base) civiproxy_http_error("Feature disabled", 405);
+
+// basic check
+civiproxy_security_check('mail-subscribe');
+
+// just forward, no parameters
+civiproxy_redirect($target_mail_base . '/subscribe', array());
+
diff --git a/proxy/mailing/unsubscribe.php b/proxy/mailing/unsubscribe.php
new file mode 100644
index 0000000..7c6cb2b
--- /dev/null
+++ b/proxy/mailing/unsubscribe.php
@@ -0,0 +1,30 @@
+<?php
+/*--------------------------------------------------------+
+| SYSTOPIA CiviProxy                                      |
+|  a simple proxy solution for external access to CiviCRM |
+| Copyright (C) 2015 SYSTOPIA                             |
+| Author: B. Endres (endres -at- systopia.de)             |
+| http://www.systopia.de/                                 |
++---------------------------------------------------------*/
+
+require_once "../config.php";
+require_once "../proxy.php";
+
+// see if mail open tracking is enabled
+if (!$target_mail_base) civiproxy_http_error("Feature disabled", 405);
+
+// basic check
+civiproxy_security_check('mail-unsubscribe');
+
+// basic restraints
+$valid_parameters = array(    'jid'          => 'int',
+                              'qid'          => 'int', 
+                              'h'            => 'hex');
+$parameters = civiproxy_get_parameters($valid_parameters);
+
+// check if parameters specified
+if (empty($parameters['jid'])) civiproxy_http_error("Missing/invalid parameter 'jid'.");
+if (empty($parameters['qid'])) civiproxy_http_error("Missing/invalid parameter 'qid'.");
+if (empty($parameters['h']))   civiproxy_http_error("Missing/invalid parameter 'h'.");
+
+civiproxy_redirect($target_mail_base . '/unsubscribe', $parameters);
diff --git a/proxy/proxy.php b/proxy/proxy.php
index 4ca5f26..1fa10f1 100644
--- a/proxy/proxy.php
+++ b/proxy/proxy.php
@@ -155,6 +155,19 @@ function civiproxy_get_parameters($valid_parameters) {
       } elseif ($type == 'float2') {
         // TODO: check if safe wrt l10n. rather use sprintf
         $value = number_format($value, 2, '.', '');
+      } elseif ($type == 'hex') {
+        // hex code
+        if (!preg_match("#^[0-9a-f]*$#gi", $value)) {
+          error_log("CiviProxy: removed invalid hex parameter");
+          $value = '';
+        }
+      } elseif ($type == 'email') {
+        // valid email
+        // TODO: regex email address
+        // if (!preg_match("#^[0-9a-f]*$#gi", $value)) {
+        //   error_log("CiviProxy: removed invalid hex parameter");
+        //   $value = '';
+        // }
       } elseif (is_array($type)) {
         // this is a list of valid options
         $requested_value = $value;