Sent out emails to multiple leads using an email template. Where do I see the list of people that email went out to?

Sent out emails to multiple leads using an email template. Where do I see the list of people that email went out to?

Hi,

I send out an initial email using an custom email template that I created. Now, I want to followup with them.  Where can I find out who the emails went out to? I do not see anything in sent folder. Am I looking in the wrong place

Thanks,
Saroj