550-Please turn on SMTP Authentication in your mail client.

550-Please turn on SMTP Authentication in your mail client.

Please solve the issue

I am Getting Incoming mails but from Gmail if i send the mail it is not going to ZOHO mail Box..........


Delivery to the following recipient failed permanently:


      admin@diyahosting.com

Technical details of permanent failure:
Google tried to deliver your message, but it was rejected by the server for the recipient domain  diyahosting.com  by  diyahosting.com .

The error that the other server returned was:
550-Please turn on SMTP Authentication in your mail client.
550-mail-wj0-f182.google.com  [209.85.210.182]:40924 is not permitted to relay
550 through this server without authentication.


Please give me exact solution to this mail --------> diyahosting@gmail.com

Regards,
Rohith