NFS to Mail with the file as attachment in PI 7.31 single stack

Hi Experts,

I am working on PI 7.31 single stack,my scenario is same as above where I have to pull the files and email to constant email address which I have done through ICO no

ESR objects. But the receiver channel is functioning in error and message got failed in PI. Please find the below error code:

"Transmitting the message to endpoint <local> using connection File_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: [smtp server of outlook]"

Please help to resolve the issue.

Thanks,

Nithin.