no mail about scratch

project.config

diff --git a/project.config b/project.config
index 97d5364..ab64389 100644
--- a/project.config
+++ b/project.config
@@ -64,7 +64,9 @@
 [notify "codereviews"]
 	email = golang-codereviews@googlegroups.com
 	header = cc
+	filter = -project:scratch
 [notify "checkins"]
 	email = golang-checkins@googlegroups.com
 	header = to
 	type = submitted_changes
+	filter = -project:scratch