title: Radiant mailer and flash message
body: <p>I'm using Radiant with the <a href="http://github.com/radiant/radiant-mailer-extension" rel="nofollow noreferrer">mailer</a> extension to provide a contact form on my website.</p>
  
  <p>I'd like to display a nice "your email has been successfully sent" message after sending the email.<br />
  However Radiant seems to only allow redirect in it's configuration. Not to define flash messages.<br />
  Would you know of a way to define flash messages via the radiant mailer extension ?</p>