app/views/notifier/signup_notification.html.erb
<!DOCTYPE html>
<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" />
</head>
<body>
<p style='text-align:center;'>
<%= "Thanks for subscribing to the #{ I18n.t(:company) } newsletter." %>
</p>
<p style='text-align:center;text-transform:uppercase;'>
<%= render :partial => 'notifier/main_footer' %>
</p>
</body>
</html>