The message you just replied to was from Wufoo's mail server. That
means you just emailed a machine (his name is Fred!) and probably not
the intended recipient. You've got two options, but up front, we want
you to know that the second one is better :
1) You can copy/paste the message you just wrote into a new email with
the person you want to respond to in the To: field.
OR
2) Set it up in Wufoo so that when you hit the reply button on our
notification emails, that you automatically reply to an email address
you're collecting on your form. You can set this up in the
Notification Settings under the Set Reply To option.
Here's a link about that in the documentation: