I tried several different ways but I was not successful on SMTP connection from my website contact page via my ZOHO email while the connection is successful when I am using my Gmail account SMTP.

SMTP conection using zoho account is  successful   but not sending email.

Here is the Error:

CLIENT: 553 Relaying disallowed as "example@email.com" 2017-09-16 16:39:39 SMTP ERROR: DATA END command failed: 553 Relaying disallowed as " example@email.com" 2017-09-16 16:39:39 SMTP Error: data not accepted. PHPMailer error: SMTP Error: data not accepted.SMTP server error: DATA END command failed Detail: Relaying disallowed as " example@email.com" SMTP code: 5532017-09-16 16:39:39 CLIENT -> SERVER: QUIT 2017-09-16 16:39:39 SERVER -> CLIENT: 2017-09-16 16:39:39 SMTP ERROR: QUIT command failed: 2017-09-16 16:39:39 Connection: closed