From top left part of plugin interface:
<p>Your Name (required)
[text* your-name] </p>
<p>Your Email (required)
[email* your-email] </p>
<p>Subject
[text your-subject] </p>
<p>Your Message
[textarea your-message]
[checkbox checkbox-900 use_label_element "Gardens" "Distribution"]
</p>
<p>[submit "Send"]</p>
From Message preview area on right:
From: [your-name] <[your-email]>
Subject: [your-subject]
Message Body:
[your-message]
[checkbox-900 use_label_element "Gardens" "Distribution"]
--
From email (both checkboxes checked):
From: Theresa Jennings <theresajennings2011@gmail.com>
Subject:
Message Body:
[checkbox-900 use_label_element "Gardens" "Distribution"]
--