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troubleshooting Question

Issues with Mail sent from Exchange to Lotus Notes, caught in routing loop

Avatar of JasonLattin
JasonLattin asked on
ExchangeLotus IBMDNS
7 Comments1 Solution1472 ViewsLast Modified:
We run MS Exchange 2003 SP2 (Amstel) and Lotus Notes 7.0.1 (SouthPaw). Both applications are running on Windows 2003 SP1 Servers.  Our Exchange server is our production mail server that is used by all our employees.  
The Lotus Notes server is set up for testing.  I have set up Lotus Notes to use our exchange server as a smart host to relay messages.  

I am able to send email with in Lotus Notes, to other Lotus Notes users.  I am able to send emails out of our network to yahoo accounts from with in Lotus Notes (using our exchange server to relay).  I am able to send emails from Lotus Notes to our exchange users with no issues.  

The problem lies when I try to send email from our exchange side to a user on the Lotus Notes side.  When the email is sent, I can see Lotus Notes server get the email, then relay the message right back to the exchange server.  The mail then gets caught in a loop that exchange eventually kicks out with the message:

<southpaw.domain.com #5.0.0 X-Notes; Error transferring to 192.168.120.40; Maximum  hop count exceeded.  Message probably in a routing loop.  >

I have the created DNS records, MX Records so that mail sent to the Lotus Notes domain gets sent to the Lotus Notes Server.  I don’t believe that there are any issues with the routing to the server as I can see the message arrive at the Lotus Notes server and then get relayed back.  I believe the issue is with name resolution on the Lotus Notes side.  It behaves like it doesn’t recognize that the email is for one of its own users, and just forwards it back to exchange.  I have tried replying to the message received on exchange, tried using the internet name setup for the users on Lotus Notes.  And tried using username/LotusNotes@Domain.com  

Here are the messages on the Lotus Notes server when the email is received and then forwarded back to exchange.  
03/21/2007 08:13:15 AM  SMTP Server: 192.168.120.40 connected
03/21/2007 08:13:16 AM  SMTP Server: Message 0048A018 (MessageID: <16D8AB73D343FD4FB95FA8A630B6FE1E850196@amstel.domain.com>) received
03/21/2007 08:13:16 AM  SMTP Server: 192.168.120.40 disconnected. 1 message[s] received
03/21/2007 08:13:16 AM  Router: Transferring mail to domain 192.168.120.40 (host 192.168.120.40 [192.168.120.40]) via SMTP
03/21/2007 08:13:16 AM  Router: Transferred 1 messages to 192.168.120.40 (host 192.168.120.40) via SMTP
03/21/2007 08:13:16 AM  SMTP Server: 192.168.120.40 connected
03/21/2007 08:13:16 AM  SMTP Server: Message 0048A07C (MessageID: <16D8AB73D343FD4FB95FA8A630B6FE1E850196@amstel.domain.com>) received
03/21/2007 08:13:16 AM  SMTP Server: 192.168.120.40 disconnected. 1 message[s] received
03/21/2007 08:13:17 AM  Router: Message 0048A018 transferred to 192.168.120.40 for UserName@IRLotusNotes.com via SMTP
03/21/2007 08:13:17 AM  Router: Message 0048A018 transferred to 192.168.120.40 for UserName/LotusNotes@irlotusnotes.com via SMTP
03/21/2007 08:13:17 AM  Router: Transferring mail to domain 192.168.120.40 (host 192.168.120.40 [192.168.120.40]) via SMTP
03/21/2007 08:13:17 AM  Router: Transferred 1 messages to 192.168.120.40 (host 192.168.120.40) via SMTP
03/21/2007 08:13:17 AM  SMTP Server: 192.168.120.40 connected
03/21/2007 08:13:17 AM  SMTP Server: Message 0048A0D5 (MessageID: <16D8AB73D343FD4FB95FA8A630B6FE1E850196@amstel.domain.com>) received
03/21/2007 08:13:17 AM  SMTP Server: 192.168.120.40 disconnected. 1 message[s] received
03/21/2007 08:13:18 AM  Router: Message 0048A07C transferred to 192.168.120.40 for UserName@IRLotusNotes.com via SMTP
03/21/2007 08:13:18 AM  Router: Message 0048A07C transferred to 192.168.120.40 for UserName/LotusNotes@irlotusnotes.com via SMTP
03/21/2007 08:13:18 AM  Router: Transferring mail to domain 192.168.120.40 (host 192.168.120.40 [192.168.120.40]) via SMTP
03/21/2007 08:13:18 AM  Router: Transferred 1 messages to 192.168.120.40 (host 192.168.120.40) via SMTP
03/21/2007 08:13:23 AM  Router: Message 0048A0D5 transferred to 192.168.120.40 for UserName@IRLotusNotes.com via SMTP
03/21/2007 08:13:23 AM  Router: Message 0048A0D5 transferred to 192.168.120.40 for UserName/LotusNotes@irlotusnotes.com via SMTP

Please let me know if you any additional information.
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