If you note in the original message :

 Received: from localhost (localhost [127.0.0.1])
   (uid 48)

who is uid 48?

----- Original Message ----- 
From: "Jesse Keating" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, July 11, 2002 4:18 PM
Subject: [courier-users] Hack attempt?


> This morning I got some odd undeliverable error messages:
> 
> Received: from localhost (localhost [127.0.0.1])
>   (ftp://ftp.isi.edu/in-notes/rfc1894.txt)
>   by mail.j2solutions.net with dsn; Thu, 11 Jul 2002 07:00:32 -0700
> From: "Courier mail server at mail.j2solutions.net" <@>
> To: [EMAIL PROTECTED]
> Subject: NOTICE: mail delivery status.
> Mime-Version: 1.0
> Content-Type: multipart/report; report-type=delivery-status;
>     boundary="=_courier_0"
> Content-Transfer-Encoding: 7bit
> Message-ID: <[EMAIL PROTECTED]>
> Date: Thu, 11 Jul 2002 07:00:32 -0700
> 
> 
> This is a delivery status notification from mail.j2solutions.net,
> running the Courier mail server, version 0.39.1.
> 
> The original message was received on Thu, 11 Jul 2002 07:00:32 -0700
> from localhost (localhost [127.0.0.1])
> 
> -----------------------------------------------------------------------
> ----
> 
>                            UNDELIVERABLE MAIL
> 
> Your message to the following recipients cannot be delivered:
> 
> <[EMAIL PROTECTED]>:
> <<< No such domain.
> 
> -----------------------------------------------------------------------
> ----
> 
> If your message was also sent to additional recipients, their delivery
> status is not included in this report.  You may or may not receive
> other delivery status notifications for additional recipients.
> 
> The original message follows as a separate attachment.
> 
> 
> 
> [message/delivery-status (337 bytes)]
> Reporting-MTA: dns; mail.j2solutions.net
> Arrival-Date: Thu, 11 Jul 2002 07:00:32 -0700
> Received-From-MTA: dns; localhost (localhost [127.0.0.1])
> 
> Final-Recipient: rfc822; [EMAIL PROTECTED]
> Action: failed
> Status: 5.0.0
> Diagnostic-Code: unknown; No such domain.
> 
> 
> Received: from localhost (localhost [127.0.0.1])
>   (uid 48)
>   by mail.j2solutions.net with local; Thu, 11 Jul 2002 07:00:32 -0700
> To: [EMAIL PROTECTED]
> Subject: 
> From: [EMAIL PROTECTED]
> Reply-To: 
> Message-ID: <[EMAIL PROTECTED]>
> Date: Thu, 11 Jul 2002 07:00:32 -0700
> 
> 
> 
> 
> 
> MESSAGE: sure some people would be interested about whats in here
> 
> 
> 
> This conserns me because it looks like the mail is coming from
> [EMAIL PROTECTED] (which only I have a password for, and root doesn't
> allow remote logins), and the original message doesn't look like
> anything that one of my services would send out.
> 
> After further investigation into my log files, I do see some mail go
> through as [EMAIL PROTECTED] to [EMAIL PROTECTED]  which is a valid
> address.  This bothers me greatly, and I would like help in finding out
> if somehow I was hacked or if there is an unknown exploit to
> courier-mta.
> 
> These are the versions of Courier running on my Red Hat 7.2 server:
> 
> courier-maildrop-wrapper-0.39.1-1.7.2
> courier-sendmail-wrapper-0.39.1-1.7.2
> courier-imapd-0.39.1-1.7.2
> courier-pop3d-0.39.1-1.7.2
> courier-webmail-0.39.1-1.7.2
> courier-maildrop-0.39.1-1.7.2
> courier-mysql-0.39.1-1.7.2
> courier-webadmin-0.39.1-1.7.2
> courier-0.39.1-1.7.2
> courier-mlm-0.39.1-1.7.2
> courier-smtpauth-0.39.1-1.7.2
> 
> 
> -- 
> Jesse Keating
> j2solutions.net
> Mondo DevTeam (www.mondorescue.org)
> 
> Was I helpful?  Let others know:
>  http://svcs.affero.net/rm.php?r=jkeating
> 
> 
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