Nop, that´s not a valid
action for the form.
Your
form action will be the file (including url to it), where you´ll make the verification of the submitted data and/or send the email!
You can have all that verification, send email and/or sucess messages codes in the same file!
If you don´t know how to verify the data and/or send the email, please see
this post!
BTW, why you want to use php's header() or like you said redirect!? Becose of the form!? It already does it to the given
action!
Cheers,
Gesf