Zoho creator generated Emails are not longer received at Gmail and at Yahoo accounts

Zoho creator generated Emails are not longer received at Gmail and at Yahoo accounts

Hi,
We have a form when upon new record additions an email is generated to recipients at Gmail and Yahoo.  This used to work as of 3 months ago and has now stopped working.   The intended recipients are complaining that they no longer get these zohocreated emails.

After spending some time on phone with Zoho support and experimenting I narrowed this down to the fact that Gmail and Yahoo are not delivering these emails.

An email box hosted on hostmonster however is receiving below. So it seems Gmail/Yahoo no longer allow mailserver@zohocreator.com mail server to forward emails on behalf a user with yahoo email address see  u ser@myhostmonsterhostedaccount.com below.

So is Zoho addressing this issue with these mail providers ? Let them know to allow rules to accept these emails and not treat them as spam trolls ?

I have changed the names to protect the innocent.




Examining the Email header that was succesfully delivered to hostmonster email address I see:
Return-path: <mailserver@zohocreator.com>
Envelope-to: user@myhostmonsterhostedaccount.com
Delivery-date: Thu, 17 Jul 2014 17:03:46 -0600
Received: from [72.5.230.66] (port=52656 helo=resolver1.sv4.zoho.com)
     by host276.hostmonster.com with esmtps (TLSv1:DHE-RSA-AES256-SHA:256)
     (Exim 4.82)
     (envelope-from <mailserver@zohocreator.com>)
     id 1X7uiI-0001f8-3E
     for myuser@gmail.com; Thu, 17 Jul 2014 17:03:46 -0600
Received: from 172.31.252.119 ([172.31.252.119])
     by resolver1.sv4.zoho.com (8.14.4/8.13.1) with ESMTP id s6HN3eaK003290
     for <myuser@gmail.com>; Thu, 17 Jul 2014 16:03:40 -0700
Date: Thu, 17 Jul 2014 16:03:40 -0700 (PDT)
From: myzohoappuserid@yahoo.com
To: user@myhostmonsterhostedaccount.com