mail.settings.login can be None,False,0,''

VERSION

@@ -1 +1 @@
-Version 2.00.0 (2012-05-17 09:55:01) dev
+Version 2.00.0 (2012-05-17 10:53:49) dev

gluon/tools.py

@@ -646,7 +646,7 @@ class Mail(object):
                     server.ehlo()
                     server.starttls()
                     server.ehlo()
-                if not self.settings.login is None:
+                if not self.settings.login:
                     server.login(*self.settings.login.split(':',1))
                 result = server.sendmail(self.settings.sender, to, payload.as_string())
                 server.quit()