This is also listed in the wordpress.org forums at http://wordpress.org/support/topic/336666
I am getting an Internal Server Error 500 when I click the send button. I am running WPMU v2.8.6 and have the plugin in the plugins folder NOT the mu-plugins folder.
Also, when I try to update options, I get a page that says, "Error! Options page not found."
I have also already tried removing the "@" from "@mail" to no avail. The only error I get is the 500.
I have SMCF installed on another domain in a subdirectory on the same server runnging WordPress (not MU...haven't migrated it over yet) and it works fine. Very confusing.
My site: http://thekruser.com
Any ideas? Thank you for your time and help. Have a great day!
http://wordpress.org/extend/plugins/simplemodal-contact-form-smcf/