Automatic email after Sale order creation

Hi

I need to send an email to the customer, immediately after the sale order creation. On searching SCN, I got to know that in MV45AFZZ under USEREXIT_SAVE_DOCUMENT we need to add code, as this exit will be invoked each time when we create or change any sales order. My question is do we have any FM to send the email to the particular customer. It would be really helpful if some one can provide the pseudo code.

Regards

Shravan.