Hello

I have checked on https://mxtoolbox.com
and everything seems to be fine but i cant receive emails

When i try sending emails to info@greatajjuna.org the email registered to zoho
i get error below

The response was:

550 Please turn on SMTP Authentication in your mail client, or login to the IMAP/POP3 server before sending your message. mail-wr0-f171.google.com [209.85.128.171]:39771 is not permitted to relay through this server without authentication.

Final-Recipient: rfc822; info@greatajjuna.org
Action: failed
Status: 5.0.0
Remote-MTA: dns; greatajjuna.org. (64.20.39.210, the server for the domain greatajjuna.org.)
Diagnostic-Code: smtp; 550-Please turn on SMTP Authentication in your mail client, or login to the
 550-IMAP/POP3 server before sending your message.  mail-wr0-f171.google.com
 550-[209.85.128.171]:39771 is not permitted to relay through this server
 550 without authentication.
Last-Attempt-Date: Tue, 20 Feb 2018 03:00:39 -0800 (PST)