Not receiving emails from contact form

Not receiving emails from contact form

I'm not receiving the e-mails sent from the contact form of my site ( http://invictusjuridico.com.br/contato.html).

In my server (Arvixe) I configured to forward all emails sent to contato@invictusjuridico.com.br to my Gmail account ( leandrorpaiva@gmail.com). There I receive all the emails and forward, one by one, to my Zoho account (contato@).

I receive (and send) all e-mails in the Zoho account, less the e-mails sent from contact form.

Can someone help me? All my settings (MX, DKIM...) are ok. What setting I forgot?

Thanks!