Hi Arunava,
you just need to configure it via nace, of course. You want two recipient I highly recommend you to create two entries for it.
Why: 1. You are able to see if both are sent correctly via the protocol.
2. Something wrong, it is much easier to dig for the reason.
3. It is just the normal customizing you are familiar to.
You can check if your mail has been sent correctly via transaction SOST. There you can see mail/fax...
Here is a link if you get in trouble:
Message Control Structure - Message Control (CA-GTF-BS) - SAP Library
~Florian