Date:  Mon, 20 Mar 2006 13:24:42 -0800
From:  "Ken Marcus -  Precision Web Hosting, Inc." <kenmarcus (at mark) precisionweb.net>
Subject:  [coba-e:04318] Re: The following recipient(s) could not be reached:   apaceh@
To:  <coba-e (at mark) bluequartz.org>
Message-Id:  <010d01c64c64$d56feac0$6700a8c0@youro1n9oy17sk>
References:  <D6B11AFC0E79FB44AA45F52E4B230EE507E107 (at mark) cow.got-milk.co.uk>
X-Mail-Count: 04318


>I got that message in my inbox coming from my server:
> 
> 
> Your message did not reach some or all of the intended recipients.
> 
>      Subject: Returned mail: see transcript for details
>      Sent: 20/03/2006 20:13
> 
> The following recipient(s) could not be reached:
> 
>      apache (at mark) ns.nywtc.co.uk on 20/03/2006 20:13
>            The message cannot be delivered due to a configuration error
> on the server. Please contact your Administrator.
>            < ns.nywtc.co.uk #5.3.0 SMTP; 553 5.3.0
> <apache (at mark) ns.nywtc.co.uk>... No such user here>
> 
> 
> 
> 
> What could it be?
> 
> Regards
> Stephane
> 


Try adding something like this to the /etc/mail/virtusertable 
apache (at mark) ns.nywtc.co.uk        admin

Then
makemap hash /etc/mail/virtusertable < /etc/mail/virtusertable 


----
Ken Marcus
Precision Web Hosting, Inc.
http://www.precisionweb.net