The answer to this sort of depends on what the checkboxes are for.
if each of the checkboxes coresponds to a column in a table, you can use the Data Assist Insert record behavior and bind each column to the corresponding checkbox. to access the insert record behavior open the server behaviors panel, and select WebAssist -> Data Assist -> Insert record -> Insert Single record.
Or the checkboxes may be used to create a Relational table, such as inserting a Product and signing it to multiple genres. In that case you would use the Manage Relational Table behavior. there is a tutorial for this here:
as for sending the email, use the Universal Email behavior; WebAssist -> Create Email Message. Select the option to manage the email body from a file, and code will be added to the email template to send the form contents.