I tried several time different ways but I was not successful on SMTP to send emails from my website contact page via my ZOHO email while the connecting via other email providers are successful and Email send via SMTP.

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