[Plugin: Contact Form 7] senders email showing up as [email protected]

I’m not sure when this started as I just noticed it but every time someone uses the contact form I get the email but the senders email is [email protected] Of course this makes if impossible to respond and is very frustrating.

Any ideas what to do. You can view my form here.
https://www.gearupandplay.com/2009/08/earn-money-writing-for-gear-up-and-play/

thanks