How to keep track of e-mails sent

I have a script that sends automatic e-mails when a record is added or updated. I want to be able to keep track of what type, when, to whom and from whom the e-mail was sent. I was thinking of having a new form with all these fields available but I don't know how to populat a table just through scripting and without using the form. I know that it is possible to edit specific records using the fetch function. Is it possible to add records, though?