ZPress configured your email portal to be easily accessible via your domain name.
This guide will lead you through the login process.
There are 2 ways to do it:
Both will leads you to the ZOHO Mail portal.
Login with your ZOHO email and password. Upon ZPress releases, for security reason, we enabled 2nd Authentication at the organisation level. Follow through the guidance offered by ZOHO to setup yours.
NOTE:
Let the authentication proceeds and you should be redirected to the ZOHO mailbox interface.