From mail address needs to be modified for mails triggering from object workflows

Summary:

Our customer has a requirement to change from mail address, as few of the mails we are sending to their customer contacts they don't want to see oracle in from mail address. We have done the changes in BPM worklist in administration but only alias name got changed now when mail is triggered from mail address is coming as NTT CRM Notification <ehte-test.fa.sender@workflow.mail.em2.cloud.oracle.com>. We are able to change only alias name that is NTT CRM Notification but ehte-test.fa.sender@workflow.mail.em2.cloud.oracle.com this one we are not able to change, is there any way to change the same?