--- a/plugins/mod_admin_telnet.lua	Sun Jun 02 16:23:19 2013 -0400
+++ b/plugins/mod_admin_telnet.lua	Tue Jun 04 19:35:41 2013 +0200
@@ -958,7 +958,7 @@
 	local username, host = jid_split(jid);
 	if not hosts[host] then
 		return nil, "No such host: "..host;
-	elseif um.user_exists(username, host) then
+	elseif not um.user_exists(username, host) then
 		return nil, "No such user";
 	end
 	local ok, err = um.delete_user(username, host);