RE: Address encapsulation question

  • From: "Kalpesh Pitale" <kalpesh.pitale@xxxxxxxxxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Mon, 26 Aug 2002 15:41:41 +1000

This generally happens due to incorrect Email-Topology or  X.400 OR IMS. It 
will be easy for me to input if you have topology dia and also your IMS or 
X.400 connectors details.
Try to check the connector configurations...

[Kalpesh Pitale] 
 -----Original Message-----
From: Humphrey, Jay CIV [mailto:c6fsysad@xxxxxxxxxxxx]
Sent: Sunday, 25 August 2002 4:38 PM
To: [ExchangeList]
Subject: [exchangelist] Address encapsulation question

Hi all,
 We are experiencing a weird problem with how Exchange encapsulates X.400 
addresses in SMTP. We have 16 separate sites in various parts of the world all 
part of the same organization. Directory replication is done over SMTP. We are 
seeing all of the sites in the GAL and get directory updates when changes are 
made. However, we are having an issue with two of our servers encapsulating the 
incorrect SMTP domain onto messages sent over the IMC. On these two servers the 
IMC is configured to forward messages to a Unix-based email relay rather than 
use DNS.
What happens is instead of putting the SMTP domain address for the recipient 
exchange is adding the SMTP address for the next hop. So for example a user on 
ServerA sends a message to a user on ServerD but the message has to pass 
through ServerB and ServerC (bridgehead) to get there. Instead of encapsulating 
the message like
the address ends up something like

Notice that it has the correct site name of ServerD but yet it still adds the 
incorrect SMTP address. Normally this would not be that big of a deal but this 
is causing some NDRs due to excessive hops because most of these servers are 
inside of firewalls and the messages have to pass through the firewalls as well 
as various other virus scanners and what-not. It also causes each server in the 
link to have to process the message instead of just forwarding it on because 
the SMTP address that is appended makes it appear that the message is for that 
server rather than the actual recipient's server.
I have been troubleshooting this issue to death and have not made a 
breakthrough yet. I am hoping someone on the list can shed some light.
Thank you,
Jay Humphrey
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