Receiving "550 Please turn on SMTP Authentication in your mail client" when trying to sending email to my zoho email

Receiving "550 Please turn on SMTP Authentication in your mail client" when trying to sending email to my zoho email

 I configured my dns mx records, spf, DKIM and got them all verified in my Zoho Mail Control Panel. I am able to received email from hotmails and other email addresses except gmail. When I tried to send an email from my gmail to my zoho email, here is the error I got back:


Message not delivered
There was a problem delivering your message to info@kimkimmedi.com. See the technical details below.
The response from the remote server was:

550 Please turn on SMTP Authentication in your mail client. mail-wm0-f45.google.com [74.125.82.45]:37667 is not permitted to relay through this server without authentication.

Final-Recipient: rfc822; info@kimkimmedi.com
Action: failed
Status: 5.0.0
Remote-MTA: dns; kimkimmedi.com. (119.81.140.206, the server for the domain kimkimmedi.com.)
Diagnostic-Code: smtp; 550-Please turn on SMTP Authentication in your mail client.
 550-mail-wm0-f45.google.com [74.125.82.45]:37667 is not permitted to relay
 550 through this server without authentication.
Last-Attempt-Date: Fri, 10 Mar 2017 17:35:59 -0800 (PST)



My domain is kimkimmedi.com. Please help!

Regards,
Hieu Nguyen