When postfix can't deliver a message it will keep retrying for up to 5 days. When this happens an email is sent back to the sender that says the email was delayed and will be retried. On some of my systems the sender and recipient are the same address (for various reasons) and this email about the message being retried creates a bit of a feedback loop. Does anyone know how to configure postfix to not send the message to the sender that the email is delayed? Thanks, Jon