diff --git a/core/attributedef.class.inc.php b/core/attributedef.class.inc.php
index 1ffa37ec7..4cc794199 100644
--- a/core/attributedef.class.inc.php
+++ b/core/attributedef.class.inc.php
@@ -2078,7 +2078,7 @@ 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})$";
-		return "^[a-zA-Z0-9._&-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$";
+		return "^[a-zA-Z0-9._&-]+@[a-zA-Z0-9.-]+\.[a-zA-Z0-9-]{2,}$";
 	}
 
 	public function GetAsHTML($sValue, $oHostObject = null, $bLocalize = true)