Form submissions

View any form submissions on the More options > Form submissions tab.

Filter by
Change the Filter by drop down to view submissions by the page on which they were submitted.

Mailing list

Visitors can add their email address to a mailing list and these email addresses can be viewed here.

Export
You can view a comma or semi-colon separated list of email addresses that have been submitted to your mailing list.  Paste this list into your favorite email program to send email.
 

Contact form

View contact form submissions from different pages on your site on the More options > Form submissions > Contact form tab.