diff --git a/TODO.txt b/TODO.txt
index 6dcae104a29e055a6febd2ce4b761d7070052ef3..382f8afa7a0eab987c634c372dbb2fc7051f025b 100644
--- a/TODO.txt
+++ b/TODO.txt
@@ -26,13 +26,6 @@ Server
 Mail module
 --------------------------------------
 
-- Show mail statistics in the interface. The mail statistics are stored
-  in the database table mail_traffic and are collected by the file
-  server/cron_daily.php
--- For Courier this works but not Dovecot. Maybe the intention needs
-	reviewed as some clients think this should be the number of emails
-	and not the size of the emails.  (I agree that size is important)
-		lathama
 
 Administration module
 --------------------------------------
diff --git a/interface/lib/classes/tform_base.inc.php b/interface/lib/classes/tform_base.inc.php
index bc995c17b2873c2fba7b055cbf1c6fad914cfab4..4405de4c53365854cc8ec9c8c324d02fadf7d7cc 100644
--- a/interface/lib/classes/tform_base.inc.php
+++ b/interface/lib/classes/tform_base.inc.php
@@ -974,16 +974,21 @@ class tform_base {
 					}
 				}
 			case 'ISEMAIL':
-				if(function_exists('filter_var')) {
-					if(filter_var($field_value, FILTER_VALIDATE_EMAIL) === false) {
-						$errmsg = $validator['errmsg'];
-						if(isset($this->wordbook[$errmsg])) {
-							$this->errorMessage .= $this->wordbook[$errmsg]."<br />\r\n";
-						} else {
-							$this->errorMessage .= $errmsg."<br />\r\n";
+				if($validator['allowempty'] != 'y') $validator['allowempty'] = 'n';
+				if($validator['allowempty'] == 'y' && $field_value == '') {
+					//* Do nothing
+				} else {
+					if(function_exists('filter_var')) {
+						if(filter_var($field_value, FILTER_VALIDATE_EMAIL) === false) {
+							$errmsg = $validator['errmsg'];
+							if(isset($this->wordbook[$errmsg])) {
+								$this->errorMessage .= $this->wordbook[$errmsg]."<br />\r\n";
+							} else {
+								$this->errorMessage .= $errmsg."<br />\r\n";
+							}
 						}
-					}
-				} else $this->errorMessage .= "function filter_var missing <br />\r\n";
+					} else $this->errorMessage .= "function filter_var missing <br />\r\n";
+				}
 				break;
 			case 'ISINT':
 				if(function_exists('filter_var') && $field_value < 2147483647) {
diff --git a/interface/web/client/form/client.tform.php b/interface/web/client/form/client.tform.php
index 8de41055392a576a3ff6b88778d4ca04e7196f40..4415768d62d6b9043391265b9e984f4b0b8d44c2 100644
--- a/interface/web/client/form/client.tform.php
+++ b/interface/web/client/form/client.tform.php
@@ -501,7 +501,7 @@ $form["tabs"]['address'] = array (
 					'type' => 'TOLOWER')
 			),
 			'validators' => array (
-				0 => array ( 'type' => 'ISEMAIL', 'errmsg'=> 'email_error_isemail'),
+				0 => array ( 'type' => 'ISEMAIL', 'allowempty' => 'y', 'errmsg'=> 'email_error_isemail'),
 			),
 			'default' => '',
 			'value'  => '',
diff --git a/interface/web/client/form/reseller.tform.php b/interface/web/client/form/reseller.tform.php
index 9bc416fd6247d8dfc2d49fd879b5c3e6bf307b58..8f4e5baf6dab40b82d785e0c7fd5024e437b8f36 100644
--- a/interface/web/client/form/reseller.tform.php
+++ b/interface/web/client/form/reseller.tform.php
@@ -499,7 +499,7 @@ $form["tabs"]['address'] = array (
 					'type' => 'TOLOWER')
 			),
 			'validators' => array (
-				0 => array ( 'type' => 'ISEMAIL', 'errmsg'=> 'paypal_email_error_isemail'),
+				0 => array ( 'type' => 'ISEMAIL', 'allowempty' => 'y', 'errmsg'=> 'paypal_email_error_isemail'),
 			),
 			'default' => '',
 			'value'  => '',
diff --git a/server/plugins-available/mongo_clientdb_plugin.inc.php b/server/plugins-available/mongo_clientdb_plugin.inc.php
index b4d274cba5ceed8868ea606374702667059224e1..62585838747b9a6e25c6ffc3004b235e5ae285b6 100644
--- a/server/plugins-available/mongo_clientdb_plugin.inc.php
+++ b/server/plugins-available/mongo_clientdb_plugin.inc.php
@@ -52,11 +52,14 @@ class mongo_clientdb_plugin {
 	function onInstall() {
 		global $conf;
 		
-		if($conf['services']['db'] == true && class_exists('MongoClient')) {
+		/*if($conf['services']['db'] == true && class_exists('MongoClient')) {
 			return true;
 		} else {
 			return false;
-		}
+		}*/
+		
+		// Disable mongodb plugin in ISPConfig 3.1
+		return false;
 	}