I have been getting this error message when I try to send email from my account on domain agriffodscientific.eu to at least one domain. The delivery error message is included below. I wonder if there is anything I can do to configure my zoho account to respond correctly to such reverse lookup requests.
Date : Fri, 20 Jun 2014 10:12:45 +0000
Subject : Mail Delivery Status Notification (Delay)
============ Forwarded message ============
> This message was created automatically by mail delivery system.
>
> THIS IS A WARNING MESSAGE ONLY.
>
> YOU DO NOT NEED TO RESEND YOUR MESSAGE.
>
> The original message was received at Fri, 20 Jun 2014 03:12:45 -0700
>
> ----- The following addresses had fatal errors -----
> [Status: Error, Address: <
...@cs.tcd.ie>, ResponseCode 450, 4.7.1 Client host rejected: cannot find your reverse hostname, [72.5.230.103]]
>
> Message will be retried for 4 more day(s)
>
> ----- Transcript of session follows -----
>
> Received:from mail.zoho.com by mx.zohomail.com
> with SMTP id 1403252013353363.8510561972565; Fri, 20 Jun 2014 01:13:33 -0700 (PDT)
> Date:Fri, 20 Jun 2014 08:13:33 +0000
> User-Agent:Zoho Mail
> To:"...." <[edited for anonymity]@...>
> Subject:orthodontist
> Content-Type:text/plain; charset="UTF-8"