Yes, by default, Online Sales Pro will send emails to your leads who opt-in to the funnels listed below. To get to these funnels, go to this page.
OSP has autoresponders for the following funnels:
Promote Your OSP Funnels
Promote Your Sales Pages
Promote Your Free Content Funnels
Promote Your OSP Webinar
If you choose to integrate AWeber, then OSP will not email your OSP leads.