SMTP Auth Problem - 554 5.7.8 Access Restricted

SMTP Auth Problem - 554 5.7.8 Access Restricted

Dear all,

I have an application running in Laravel, and I use ZohoMail to delivery some emails, and it was working for the last 7 months, and today (12/11/2020), something happen and I dont know where or how happen...

My application could note delivery my Zoho emails anymore, and it gives the following messagem:


Failed to authenticate on SMTP server with username "myemail@email.example" using the following authenticators: "LOGIN", "PLAIN".
Authenticator "LOGIN" returned "Expected response code "235" but got code "554", with message "554 5.7.8 Access Restricted".".
Authenticator "PLAIN" returned "Expected response code "235" but got code "554", with message "554 5.7.8 Access Restricted".".

I havent changed anything. My email account do not have TFA, its the same credentials, my account is not blocked fot sending emails...