Contact Form 7 - How to Style E-mails to display Check-Box items as block text

Using Wordpress 3.9.1 with Atahualpa 3.7.15 and Contact Form 7 plugin (Version 3.8.1).

The following CSS Code works to style Check-box items IN THE CONTACT FORM ITSELF as block text (each item on its own line), but does not not display the output from Check-box items as block text IN THE E-MAILS GENERATED BY THE CONTACT FORM:

span.wpcf7-list-item {
display:block;
}

How do you make the output from check-box items display as block text (each item on its own line) IN THE E-MAILS GENERATED BY THE CONTACT FORM?

In the e-mail forms, I have checked the boxes to "Use HTML Content Type" and then tried HTML styling, such as:

<div style="display: block;">[checkbox-99]</div>

But, this does not work. Cannot find any answer to my question in the forums.

Help will be much appreciated!!