Expected response code 250 but got code "553", with message "553 Relaying disallowed"

Expected response code 250 but got code "553", with message "553 Relaying disallowed"

Hi,

I am trying to send email from my Laravel PHP form on my website but the system keeps on throwing the error: 

Swift_TransportException (553)

Expected response code 250 but got code "553", with message "553 Relaying disallowed as Lee Ibrahim <myemail@stawika.com> "


Please have a look and let me know the problem with my Zoho Account.