Exchange 2013 Load balacning SMTP

Good afternoon.
There is a VLM-200 and Exchange Server 2013 DAG in one network. I set up a kemp by templates, the question arose whether the Mail Server can receive and send mail through the KEMP via SMTP and do I need to specify the IP address of the kemp on the Exchange server in the sending connection? KEMP uses NAT, is it possible to set up transparency on it, that would give out real IP addresses of all connections on the mail servers?
Thank you.