How can I remove the "by [author] on [date]" in emails?

In the email sent out I'd like to just have the post excerpt, not the "by [author] on [date]" below it. There isn't a setting for this. Could that be included in future versions of this plugin? In the meantime, is there a workaround?

I'd also like to extend the length of the post excerpt in those emails. Not to a full length post, but longer than the excerpt length set by the site sending out the emails. Is there a way of doing that?