>From: Maurice Barnwell <[log in to unmask]>
>
>All mail to a subscriber at   'DIT.UPM.ES' has bounced with the flag
>         550 Host 'DIT.UPM.ES' Unknown
>Does any one have any information on this address?
 
Well, according to our local nameservers:
 
>s.ecc $ dig any mx dit.upm.es
>; <<>> DiG 2.0 <<>> any mx dit.upm.es
>;; ->>HEADER<<- opcode: QUERY , status: NOERROR, id: 6
>;; flags: qr aa rd ra ; Ques: 1, Ans: 3, Auth: 0, Addit: 2
>;; QUESTIONS:
>;;     dit.upm.es, type = MX, class = IN
>
>;; ANSWERS:
>dit.upm.es.    86400   MX      10 babia.dit.upm.es.
>dit.upm.es.    86400   MX      20 goya.uu.es.
>dit.upm.es.    86400   MX      30 mcsun.eu.net.
>
>;; ADDITIONAL RECORDS:
>babia.dit.upm.es.      86400   A       138.4.2.7
>goya.uu.es.    33298   A       138.4.2.2
 
Any mail addressed to "[log in to unmask]" is *supposed* to be
routed through (in order of preference) babia.dit.upm.es,
goya.uu.es, and mcsun.eu.net.
 
Let's see if babia.dit.upm.es is behaving properly.......
>s.ecc $ telnet 138.4.2.7 25
>Trying 138.4.2.7 ...
>Connected to 138.4.2.7.
>Escape character is '^]'.
>220 babia.dit.upm.es Sendmail 5.65c/1.6.5 ready at Wed, 19 May 1993 23:06:58
  +0200
>vrfy [log in to unmask]
>250 <[log in to unmask] >
>vrfy [log in to unmask]
>250-<pepe@yeti>
>250 <jose@turia>
>quit
>221 babia.dit.upm.es closing connection
>Connection closed by foreign host.
>s.ecc $ exit
 
So, it appears that babia.dit.upm.es is the mail exchanger for the
dit.upm.es domain, and it seems to be forwarding normally from my
end of the net.world.  Perhaps you should check your local nameser-
vers (or domain tables).
 
--Wes
 
--
 Wes Morgan
 Systems Administrator                  [log in to unmask]
 UK College of Engineering