diff --git a/attributs.py b/attributs.py
index 6070c7b..7404e82 100644
--- a/attributs.py
+++ b/attributs.py
@@ -766,7 +766,7 @@ class mail(rightProtectedAttr):
                 raise ValueError("Le mail %s est déjà pris." % (str(self)))
 
     def parse_value(self, mail):
-        if not re.match(u'^[-_.0-9A-Za-z]+@([A-Za-z0-9]{1}[A-Za-z0-9-_]+[.])+[a-z]{2,6}$', mail):
+        if not re.match(u'^[-_.0-9A-Za-z]+@([A-Za-z0-9]{1}[A-Za-z0-9-_]+[.])+[a-z]{2,20}$', mail):
             raise ValueError("%s invalide %r" % (self.legend, mail))
         self.value = mail