diff --git a/core/attributedef.class.inc.php b/core/attributedef.class.inc.php
index 11c856ac5..e54f83741 100644
--- a/core/attributedef.class.inc.php
+++ b/core/attributedef.class.inc.php
@@ -2106,8 +2106,7 @@ class AttributeEmailAddress extends AttributeString
 {
 	public function GetValidationPattern()
 	{
-		// return "^([0-9a-zA-Z]([-.\\w]*[0-9a-zA-Z])*@([0-9a-zA-Z][-\\w]*[0-9a-zA-Z]\\.)+[a-zA-Z]{2,9})$";
-		return "^[a-zA-Z0-9._&-]+@[a-zA-Z0-9.-]+\.[a-zA-Z0-9-]{2,}$";
+		return $this->GetOptional('validation_pattern', '^'.utils::GetConfig()->Get('email_validation_pattern').'$');
 	}
 
 	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)
diff --git a/core/config.class.inc.php b/core/config.class.inc.php
index 60ff14167..b7c403959 100644
--- a/core/config.class.inc.php
+++ b/core/config.class.inc.php
@@ -640,6 +640,14 @@ class Config
 			'source_of_value' => '',
 			'show_in_conf_sample' => true,
 		),
+		'email_validation_pattern' => array(
+			'type' => 'string',
+			'description' => 'Regular expression to validate/detect the format of an eMail address',
+			'default' => "[a-zA-Z0-9._&'-]+@[a-zA-Z0-9.-]+\.[a-zA-Z0-9-]{2,}",
+			'value' => '',
+			'source_of_value' => '',
+			'show_in_conf_sample' => true,
+		),
 		'log_kpi_duration' => array(
 			'type' => 'integer',
 			'description' => 'Level of logging for troubleshooting performance issues (1 to enable, 2 +blame callers)',