Hi,
  My questiion was:
> We have an Alpha  2000/300  running Digital Unix 3.0 
> We have just gone into Enhanced Security mode running secsetup.
>
> Everything is ok but sendmail.  Our system does not receive any mail from 
> outside our domain.
> A user unknown error message is returned, and the user does exist.  (Believe 
> me). :-)
> 
>   The mail returned on the source (outside domain) system is:
> 
> From MAILER-DAEMON Tue May 28 15:31 MET 1996
> Date: Tue, 28 May 1996 15:31:00 +0200 (MET DST)
> From: Mail Delivery Subsystem <MAILER-DAEMON>
> Subject: Returned mail: User unknown
> Message-Id: <199605281331.PAA02948_at_paris.develnet.es>
> To: ccgines
> Content-Length: 1370
> 
> This is a MIME-encapsulated message
> 
> --PAA02948.833290260/paris.develnet.es
> 
> The original message was received at Tue, 28 May 1996 15:27:18 +0200 (MET DST)
> from ccgines_at_localhost
> 
>    ----- The following addresses have delivery notifications -----
> p0119_at_genio.eui.upm.es  (unrecoverable error)
> 
>    ----- Transcript of session follows -----
> ... while talking to fenix.eui.upm.es.:
>  >>> RCPT To:<p0119_at_genio.eui.upm.es>
>  <<< 550 <p0119_at_genio.eui.upm.es>... User unknown
>  550 p0119_at_genio.eui.upm.es... User unknown
> 
> --PAA02948.833290260/paris.develnet.es
> Content-Type: message/delivery-status
> 
> Reporting-MTA: dns; paris.develnet.es
> Arrival-Date: Tue, 28 May 1996 15:27:18 +0200 (MET DST)
> 
> Final-Recipient: RFC822; p0119_at_genio.eui.upm.es
> Action: failed
> Status: 5.2.0
> Remote-MTA: DNS; fenix.eui.upm.es
> Diagnostic-Code: SMTP; 550 <p0119_at_genio.eui.upm.es>... User unknown
> Last-Attempt-Date: Tue, 28 May 1996 15:30:57 +0200 (MET DST)
> 
> --PAA02948.833290260/paris.develnet.es
> Content-Type: message/rfc822
> 
> Return-Path: ccgines
> Received: (from ccgines_at_localhost) by paris.develnet.es (8.7.4/8.7.3) id PAA0294
> 7 for p0119_at_genio.eui.upm.es; Tue, 28 May 1996 15:27:18 +0200 (MET DST)
> Date: Tue, 28 May 1996 15:27:18 +0200 (MET DST)
> From: Gines Bravo <ccgines>
> Message-Id: <199605281327.PAA02947_at_paris.develnet.es>
> Content-Type: text
> 
> testing...
> 
> 
> --PAA02948.833290260/paris.develnet.es--
> 
>   ------------------8<-------------------- 8<----------------------
> 
>   Our DNS configuration is as follows:    (genio is no routed)
> 
> genio           IN      A       138.100.56.26
>                 IN      MX      10 genio.eui.upm.es.
>                 IN      MX      20 fenix.eui.upm.es.
> 
>   ------------------8<-------------------- 8<----------------------
> 
> 
>   If I turn Security mode to BASE, everything is ok again.
>   
>   Any help will be appreciated
>   TIA
> 
  I had no responses :-(  so we went back to BASE securiry.
  I will sumarize any alterations.
------------------------------------------------------------------------------
    _/_/   _/_/	 	 |  Javier Martinez Pereira
   _/  _/ _/  _/ Centro  |  Escuela Universitaria de Informatica U.P.M.
  _/     _/        de	 |  Phone: 34 +1 3367901 
 _/     _/       Calculo |  E-mail: javier_at_eui.upm.es 
  _/_/   _/_/ 		 |   		Just ones & zeros
Received on Mon Jun 10 1996 - 19:28:11 NZST