There are 5 different types of documents:
Document_Page
Document_Snippet
Document_Link
Document_Folder
Document_Email
The Document_Email extends the Document_Snippet. This document type is used to send emails.
In the "Settings" tab you can define the subject/recipients

If the email logging isn't deactivated by the Pimcore_Mail Class you can see the the sent emails in the "Sent Emails" Tab.
(The Column "Dynamic params" is hidden by default so you have to unhide it manually)

Dynamic Parameters passed when email was sent:
