SMTP Receiver Communication Channel error: connection refused

Question

Dear all.
When migrating processes from XI 3.0 to PI 7.1 we run into the problem that we can't get the SMTP Receiver Communication Channel working on PI. We get the following error in Communication Channel Monitoring:
Message processing failed. Cause: com.sap.aii.af.sdk.xi.srt.BubbleException: Failed to call the endpoint  [null "null"]; nested exception caused by: java.net.ConnectException: Connection refused: connect
(The NetWeaver Administrator log shows the following:
unable to call the mailer: com.sap.aii.af.sdk.xi.srt.BubbleException: Failed to call the endpoint  [null "null"]; nested exception caused by: java.net.ConnectException: Connection refused: connect)
- We copied all configuration settings 1-on-1 from XI to PI, and double-checked we made no mistakes.
- We confirmed the PI system can in fact reach the mailserver by successfully sending Email from the ABAP stack of the PI system (transactions SOST and SCOT)
- When deliberately mistyping the mailserver URL, we get the error: java.net.UnknownHostException. This makes me believe that the 'connection refused' error we get (after re-entering the correct mailserver URL) is indeed coming from the mailserver. But why would it refuse the connection if it allows the connection from the ABAP stack of the same server? And why didn't we run into any such problems on XI?
Any help is much appreciated!
Kind regards,
Eddy Driessen.

Answer 1

Hi All,
We have upgraded our XI3.0 system to PI7.1 and currently performing testing for different adapters. We are also facing similar problem for a scenario File to Mail
19.11.2010 11:31:56     Error     Mail: error occured: java.net.UnknownHostException: [url]
19.11.2010 11:31:56     Error     Mail: error occured: com.sap.aii.af.lib.mp.module.ModuleException
19.11.2010 11:31:56     Error     Adapter Framework caught exception: Failed to call the endpoint
19.11.2010 11:31:56     Error     Delivering the message to the application using connection Mail_http://sap.com/xi/XI/System failed, due to:                     com.sap.engine.interfaces.messaging.api.exception.MessagingException: com.sap.aii.af.sdk.xi.srt.BubbleException: Failed to call the endpoint  [null " null"];                     nested exception caused by: java.net.UnknownHostException: [url].
19.11.2010 11:31:56     Information     The message status was set to WAIT.
*[url] = Mail server
Can anyone suggest the steps to solve this error
Thanks
Varun