I am looking for info based on direct experience in using DataStage EE with Linux.

A scenario

I work for company Switch, my client is Master.

Notification Activity Stage in DataStage

SMTP Mail server name is blank.
Sender email address is DataSTage@Master.com
Recipients email address is ABC@Master.com

Above works fine, i do get a email, no issue in DataStage

But when I say, Recipients email address is XYZ@Switch.com, i do not get any emails.

In the DataStage Director log it says
Sent message to 'XYZ@Switch.com'
but i do not get any emails.

I heard "sendmail configuration" should be edited or modified

Please let me know what/where exactly i should change, so that i should get email for different domain.

Thank you,