I have email sent to my own personal domain that is hosted ( Email Hosting with Zoho) . I then autoforward the email to my gmail account.  However, I'm now getting a lot of undelivered mail emails from messages that were sent to my autoforward account and have failed on the way from there to GMai.  Here is the error that gmail sends back:

  The following message could not be forwarded to mygmail @gmail.com  for mail @mydomain.com 

Technical details of the failure: 
       5.7.1 Unauthenticated email from guest.booking.com is not accepted due to 
      5.7.1 domain's DMARC policy. Please contact the administrator of 
      5.7.1 guest.booking.com domain if this was a legitimate mail. Please visit 
      5.7.1  https://support.google.com/mail/answer/2451690  to learn about the 
      5.7.1 DMARC initiative. 96si21795280plz.28 - gsmtp

----- Transcript of session follows ----- 

Return-Path:< ssalom.499648@guest.booking.com > 
Received:from mail-me10.booking.com (mail-me10.booking.com [5.57.21.190]) by mx.zohomail.com 
    with SMTPS id 1487896474983224.18654085426817; Thu, 23 Feb 2017 16:34:34 -0800 (PST) 
Message-ID:< E1ch3qC-0004zs-5e@memta-106.ams4.prod.booking.com > 
Date:Fri, 24 Feb 2017 01:34:32 +0100 
From:mrs Shayne Salomia < ssalom.499648@guest.booking.com > 
To: mail@maildomain.com
Subject:Re: Your booking at My Hostel 
Content-Type:multipart/mixed; boundary="_----------=_1487896472273302"; charset="utf-8" 

P.S: Please note that your email forwarding will be disabled if there are too many failures.

What are our options?

Thanks,