Hello Chris,
Hm, looks like we slipped some codes in the email template structure. Can you edit the file /components/com_easyblog/themes/wireframe/emails/html/template.php and remove the codes below:
[gist]
<div style="display:none;font-size:1px;line-height:1px;max-height:0px;max-width:0px;opacity:0;overflow:hidden;mso-hide:all;font-family: sans-serif;">
(Optional) This text will appear in the inbox preview, but not the email body.
</div>
[/gist]