Answer for I have problems with my forms in site

Hello Kevin, the problem is not the hosting service , as have other forms on the site and are working properly, so I think I will surely do with a conflict of java or something similar.
The authentication of e-mails is made of how in the theme TA Pluton ?
I’ve contacted the hosting company, and do not understand why these forms , both contacts newsletter as not working!
Any idea how I can solve this problem?