[Plugin: Contact Form 7] Multiple select check boxes – help

Hi there,
I’m trying to figure out how to write the correct code in the Mail (Message Body) where a user can select one (or more) Areas of Interest, or provide there own written response (in addition to, or on it’s own).
Here’s what I have in the actual form code;

<h3>Area of Interest: <span>(required)</span></h3>
<p>You may select more than one if you wish.</p>
<span class="checkbox">[checkbox* Interest "Accounting Solutions" "Financial Planning" "Risk Management" "Other (please specify below)"]</span>

So I’d have this is the actual email;

Area of Interest: (whatever the user has chosen displayed here)

Thanks in advance.
Jas