Mail (2) error: Invalid mailbox syntax is used.

Hello!

For some reason I’m getting an error, when setting up the auto response mail (mail (2)).

The error is: Invalid mailbox syntax is used.

I’ve put in [E-mail] (the email the user writes in the message), so the person sending a message via the contact form gets a confirmation email – but it doesn’t work and I dont know how to fix the problem…

The page I need help with: [log in to see the link]