diff --git a/TestGrid.md b/TestGrid.md
index 37ebae0..997c214 100644
--- a/TestGrid.md
+++ b/TestGrid.md
@@ -67,6 +67,7 @@ Norms for the pubgrid are similar to those for some private grids:
 
  * If you are just trying out tahoe and not contributing a server, only store a small amount of data, perhaps 1-20 MB.  This is perfectly fine; people contribute resources so that new people can experiment.
  * If you are a more serious pubgrid participant, contribute some amount of disk space and run stable servers with public IP addresses (so that clients can connect to them).  Then, only store about half as much in shares (3.3x expansion for 3/10 encoding) as you provide in storage.
+ * People storing more than the above small amounts of data, as well as those running servers should be on the [tahoe-dev mailing list](http://tahoe-lafs.org/cgi-bin/mailman/listinfo/tahoe-dev).
 
 Suggested server setup: