--- modules/lsg2/lsg2-main.c.orig
+++ modules/lsg2/lsg2-main.c
@@ -180,6 +180,9 @@
    struct listserver_cgi_mode *curmode;
    char *tbuf;

+   /* turn off loose host matching */
+   LMAPI->set_var("no-loose-domain-match", "yes", VAR_GLOBAL);
+
    /* Generic header */

    if (LMAPI->get_bool("lsg2-iis-support"))