diff --git a/Doc/html/stdabout.dat b/Doc/html/stdabout.dat
index 15c6b9a486e..2e0d8a10859 100644
--- a/Doc/html/stdabout.dat
+++ b/Doc/html/stdabout.dat
@@ -42,3 +42,7 @@
     >Python mailing list</a> (which is gated to the newsgroup and
   carries the same content).
 </p>
+
+<p> For any of these channels, please be sure not to send HTML email.
+  Thanks.
+</p>