Multiple mails to be sent from checkbox selection

Hi there. Could someone please let me know what is the best way to send multiple mails to different users collected from a checkbox on the previous page. There is a page that displays all the available recipients. A users then selects which recipients he wants to receive the mail. Then the next page should process this and send the mail off. I am not sure how I should me sending the checkbox name and variables and then how to actually insert the email addresses using the mail command. Is there a better way than using a checkbox? Thanks Kevin