Courier-mta was working perfectly buy DSN module does not work. I receive the following message many, many times, instead of a valid DSN notification, finally i have to remove manually the message. Please give me some clue!

Delivered-To: us...@mydomain.com Return-Path: <> Received: from localhost (localhost [127.0.0.1]) (ftp://ftp.isi.edu/in-notes/rfc1894.txt) by host.mydomain.com with dsn; Sun, 06 May 2001 23:53:43 +0200 Message-ID: <cour...@host.mydomain.com> Date: Sun, 06 May 2001 23:53:43 +0200 To: undisclosed-recipients: ;

Logs: May 7 00:16:29 localhost courierd: started,id=00013F7E.3AF5CAE2.00002F51,from=<>,module=dsn,host=,addr=<user@my domain.com> May 7 00:16:29 localhost courierd: Waiting. shutdown time=none, wakeup time=Mon May 7 00:18:43 2001, queuedelivering=2, inprogress=1 May 7 00:16:29 localhost courierd: completed,id=00013F7E.3AF5CAE2.00002F51 May 7 00:16:29 localhost courierd: Waiting. shutdown time=Mon May 7 00:30:47 2001, wakeup time=Mon May 7 00:18:43 2001, queuedelivering=2, inprogress=0

mailq: Size Queue ID Date User From Status Recipient ---------------- --------------------------------------------------------- 1.2K 00013F6F.3AF5C6AA.00002E6F May 06 23:48 daemon us...@mydomain.com fail not-...@hotmail.com

System info: Courier-mta 0.33 (installation from rpm) Red Hat 7.0