[Help] Invalid Address, ERROR_CODE :553

[Help] Invalid Address, ERROR_CODE :553

Hi all,

First, I'm sorry for my poor english.

I'm new in this forum, and i'm glad to join you.

I'm all ready a zoho apps user, but this time when i have configured my app, i'm facing some troubles.

This is the log :

  1. This message was created automatically by mail delivery software.
  2. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error.

  4. admin@dev-en-cours.com Invalid Address, ERROR_CODE :553, ERROR_CODE :sorry, that domain isn't allowed to be relayed thru this MTA (#5.7.1)


  7. Received:from mail.zoho.com by mx.zohomail.com
  8.     with SMTP id 138927942338145.537981866754876; Thu, 9 Jan 2014 06:57:03 -0800 (PST)
  9. Message-ID:<1437781ab60.-4679568243470061215.8600563664534868895@.......>
  10. Date:Thu, 09 Jan 2014 06:57:03 -0800
  11. From:"....." <......@xxxxxxx>
  12. User-Agent:Zoho Mail
  13. To:<admin@dev-en-cours.com>
  14. Subject:test
  15. Content-Type:multipart/alternative;
  16.     boundary="----=_Part_255395_403850264.1389279423325"

I've seen the same problem here : https://help.zoho.com/portal/en/community/topic/relaying-disallowed-when-sending-to-zoho-mail
But I can't figure out this issue.

Can you help me please ?

Thanks in advance.