Reply-to field for form isn't working

Hi,

I've added forms to a site in perch_content templates and done a successful post so they appear in Perch. I've selected the appropriate field for the reply-to email address, but it doesn't seem to be working. The emails are sending, but when I hit reply they're going to the value of the 'send from address' field.

I'm using Mandrill for email delivery, and picking up the messages in Airmail on OS X, in case that helps you determine it's not an issue with Perch at all :)

Thanks, Alex