responsecode 421, 4.7.0 temporarily deferred

responsecode 421, 4.7.0 temporarily deferred

Hi,

We are getting a warning mail from  mailer-daemon@mail.zoho.com. We are trying to send mail to  geetha@design-infinity.com. Please check the issue. Here are the details:

From:  mailer-daemon@mail.zoho.com
Sent: Thursday, November 10, 2016 09:24
To:  vd@jbbsgroup.com
Subject: Mail Delivery Status Notification (Delay)

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 Wed, 09 Nov 2016 21:24:24 -0800
from  vd@jbbsgroup.com  [ vd@jbbsgroup.com ]

----- The following addresses had fatal errors -----
[Status: Error, Address: < geetha@design-infinity.com >, ResponseCode 451, 4.2.0 Internal processing error]

Message will be retried for 4 more day(s)



From: mailer-daemon@mail.zoho.com
Sent: Thursday, November 10, 2016 13:26
To: vd@jbbsgroup.com
Subject: Mail Delivery Status Notification (Delay)

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 Thu, 10 Nov 2016 01:26:22 -0800
from vd@jbbsgroup.com [vd@jbbsgroup.com]

----- The following addresses had fatal errors -----
[Status: Error, Address: < geetha@design-infinity.com >, ResponseCode 421, 4.7.0 Temporarily Deferred]

Message will be retried for 4 more day(s)