Index: trunk/server/fedora/config/etc/postfix/blocked_users
===================================================================
--- trunk/server/fedora/config/etc/postfix/blocked_users	(revision 1227)
+++ trunk/server/fedora/config/etc/postfix/blocked_users	(revision 1227)
@@ -0,0 +1,2 @@
+reuter
+cycling-club
Index: trunk/server/fedora/config/etc/postfix/main.cf
===================================================================
--- trunk/server/fedora/config/etc/postfix/main.cf	(revision 1225)
+++ trunk/server/fedora/config/etc/postfix/main.cf	(revision 1227)
@@ -31,3 +31,3 @@
 virtual_alias_maps = hash:/etc/postfix/virtual, regexp:/etc/postfix/virtual_re
 data_directory = /var/lib/postfix
-authorized_submit_users = !reuter, static:all
+authorized_submit_users = !/etc/postfix/blocked_users, static:all