How to configure postfix for sender address rewriting?

Solution Verified - Updated -

Issue

  • How to configure postfix for sender address rewriting? For example, when the system user oracle sends an email then postfix should rewrite "oracle@hostname" to "no-reply@example.com".
  • When trying to deliver mail via my ISP mail relay, I get the following error in the logs:
553 5.7.1 <root@hostname.domainname>: Sender address rejected: not owned by user user@domain

Environment

  • Red Hat Enterprise Linux (RHEL) 5
  • Red Hat Enterprise Linux (RHEL) 6
  • Red Hat Enterprise Linux (RHEL) 7
  • postfix

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