If the SMTP address (Mail from) does not exists mails should not be accepted by Domino SMTP server

If the SMTP address (Mail from) does not exists mails should not be accepted by Domino SMTP server. The email generated using mail application server ( 3rd party ) is accepted by IBM Domino server, but customer requirement is before accepting the message domino should validate the ID is exist in the domino directory or not. Like we have an option for incoming SMTP email in the server configuration document as, "Verify that local domain recipients exist in the Domino Directory".

For more information if we telnet the domino server using port 25 and try to send email using "Mail From:" option that time domino should verify if the From ID is exists in domino directory or not.