Exchange 2013 best practice to send mails

Greetings

My Org has Exchange 2013 Setup.

I am about to configure application in my environment which will send 5000+ emails via a Receive Connector to the internal/external recipients each day.

Please suggest the best practices to configure the SMTP traffic to be relayed through Exchange with out affecting any Exchange SMTP traffic.

Also, suggest if there is any way i can check the current SMTP load to ensure that my Exchange setup has adequate resources to handle the entire SMTP traffic.

Thanks in advance.