For phone app login

Please download BlueMail from playstore

Android https://play.google.com/store/apps/details?id=me.bluemail.mail

IOS: https://apps.apple.com/us/app/blue-mail-email-mailbox/

Setup steps

Step 1: choose add other account

BlueMail Setup Step 1 Setup Company Email in Phone App

Step 2: choose other email

BlueMail Setup Step 2 Setup Company Email in Phone App

Step 3: fill in your email address and password

BlueMail Setup Step 3 Setup Company Email in Phone App

Step 4: its last step, just fill in your name for you own record.

BlueMail Setup Step 4 Setup Company Email in Phone App