My Zoho mail does not receive mails generated form a wordpress form. Gmail DOES receive them.

My Zoho mail does not receive mails generated form a wordpress form. Gmail DOES receive them.

My Wordpress (using AVADA Theme) has a contact form that send the mail my mail, using my hosting services ( I do not know how).

When I set gmail account as the target mail, I receive the mail in the gmail account, with a warning: "via". 
Example: 

mail from:

john@due.como 

via s1.profesionalhosting.com 



Please see gmail support page about the topic: https://support.google.com/mail/answer/1311182?hl=en

I guess Zoho is filtering this mails, but I do need them. 
How can I set up Zoho to let this mail get into my mailbox.

Thanks
.