project.config: no mail for DO NOT REVIEW changes

project.config

diff --git a/project.config b/project.config
index 931fb56..241b79f 100644
--- a/project.config
+++ b/project.config
@@ -81,7 +81,7 @@
 [notify "codereviews"]
 	email = golang-codereviews@googlegroups.com
 	header = cc
-	filter = -project:scratch
+	filter = -project:scratch -message:\"do not review\"
 [notify "checkins"]
 	email = golang-checkins@googlegroups.com
 	header = to