--- mailman-2.1.5/src/mail-wrapper.c.orig	2002-08-23 15:40:27.000000000 -0500
+++ mailman-2.1.5/src/mail-wrapper.c	2005-02-08 22:05:23.961079746 -0500
@@ -64,6 +64,9 @@
 main(int argc, char** argv, char** env)
 {
         int status;
+	gid_t gid = getegid();
+
+	setregid(gid, gid);
 
         /* sanity check arguments */
         if (argc < 2)