Product specific emails

I would like to send an email, if a user purchased a trial version of my software.

How do I send a nopcommerce email using the API?

Is the best way to use the entity inserted order event to send the messages?

https://www.nopcommerce.com/boards/t/18287/how-can-i-execute-plugin-method-when-order-placed.aspxhttps://www.nopcommerce.com/boards/t/18287/how-can-i-execute-plugin-method-when-order-placed.aspx