This patch was posted to the SmartList mailing list in April 1997.

You may need it to avoid some problems with cc:Mail.

--- rc.submit.orig	Fri May 29 17:51:27 1998
+++ rc.submit	Fri Aug 28 18:07:37 1998
@@ -89,4 +89,6 @@
 	 (un-?|sub?)scri(be|ption))\>|\
        ^^)
+* -100^0 B ?? ^Message is undeliverable. *$
+* -100^0 ^Subject:.*cc:Mail.*Undeliverable Message
 {
   #