GKcontact doesn't send email

Hi
I configured the website with [email protected] as sender
in GKcontact plugin I set the same email
but forms are never sent
any idea ? (I tested Joomla config with send email test and it's ok)
http://www.seniors12.fr/#gkBottom1

thanks for any help

And if I disable Recaptcha, submit button redirect to error page 0
Invalid address:
TPL_GK_LANG_ERROR_DESC
???

Hi

Yes, joomla 3.5.1 as brought a small change to the mailing function and components which are based on that function will break. Gavick has developed 2 extensions which were affected: GK Registration and GK Contact. Both has been fixed and can be found in rest_files packages for Your template.