Enter your name, email address, password and click ‘Continue’.
Now click ‘Configure manually’
Enter these settings:
Incoming server:-
Protocol: IMAP
Hostname: mail.<yourdomain>
Port: 143
Connection security: STARTTLS
Authentication method: Normal password
Username: <username>
Outgoing server:-
Hostname: mail.<yourdomain>
Port: 587
Connection security: STARTTLS
Authentication method: Normal password
Username: <username>
Then click on ‘Re-test’.
Then click on ‘Done’