Magento 2 Setup Using Zoho SMTP Relaying disallowed as @

Magento 2 Setup Using Zoho SMTP Relaying disallowed as @

We use zoho mail for our domain and are trying to send sales emails. I can get test emails to work thru the system without a issue but for some reason sales emails get: Relaying disallowed as @ any idea on to look for? I have found this topic many times but do not see any solutions.

Regards
Shane