diff --git a/interface/web/mail/form/mail_user_filter.tform.php b/interface/web/mail/form/mail_user_filter.tform.php
index 1e5980af2d57419bc90b997c55512bd7e9bab2bb..f0ae4b6611af70d79648710b9dd88669379da496 100644
--- a/interface/web/mail/form/mail_user_filter.tform.php
+++ b/interface/web/mail/form/mail_user_filter.tform.php
@@ -121,7 +121,7 @@ $form["tabs"]['filter'] = array (
 			'datatype' => 'VARCHAR',
 			'formtype' => 'TEXT',
 			'validators' => array (  0 => array ( 'type' => 'REGEX',
-					'regex' => '/^[\p{Latin}0-9\.\-\_\ \&\/]{0,100}$/u',
+					'regex' => '/^[\p{Latin}0-9\.\'\-\_\ \&\/]{0,100}$/u',
 					'errmsg'=> 'target_error_regex'),
 			),
 			'default' => '',
diff --git a/interface/web/mailuser/form/mail_user_filter.tform.php b/interface/web/mailuser/form/mail_user_filter.tform.php
index ec693fff36c3b819dbcf8273b53efb99b80804e3..f9f59db31a8942276f22e76f0f2c6aa73281b272 100644
--- a/interface/web/mailuser/form/mail_user_filter.tform.php
+++ b/interface/web/mailuser/form/mail_user_filter.tform.php
@@ -94,7 +94,6 @@ $form["tabs"]['filter'] = array (
 			'datatype' => 'VARCHAR',
 			'formtype' => 'SELECT',
 			'default' => '',
-			//'value'  => array('contains'=>'contains_txt','is' => 'Is','begins'=>'Begins with','ends'=>'Ends with')
 			'value'  => array('contains'=>'contains_txt', 'is'=>'is_txt', 'begins'=>'begins_with_txt', 'ends'=>'ends_with_txt', 'regex'=>'regex_txt', 'localpart'=>'localpart_txt', 'domain'=>'domain_txt')
 		),
 		'searchterm' => array (
@@ -122,7 +121,7 @@ $form["tabs"]['filter'] = array (
 			'datatype' => 'VARCHAR',
 			'formtype' => 'TEXT',
 			'validators' => array (  0 => array ( 'type' => 'REGEX',
-					'regex' => '/^[\p{Latin}0-9\.\-\_\ \&\/]{0,100}$/u',
+					'regex' => '/^[\p{Latin}0-9\.\'\-\_\ \&\/]{0,100}$/u',
 					'errmsg'=> 'target_error_regex'),
 			),
 			'default' => '',