Retrieve Author Email based on Entry Id
I assume you're talking about getting the email address of the currently logged in user?  That's what EntryModel's authorId property will get set to, if one isn't explicitly supplied.

If so, you can do that with:

$email = craft()-&gt;userSession-&gt;getUser()-&gt;email;


If you want to get the email address of the user that is the author of the entry, then you can do:

$email = $entry-&gt;getAuthor()-&gt;email;