Please use the below information for the configuration.
Incoming Email:
- IMAP Server: us3.imap.mailhostbox.com
- POP Server: us3.pop.mailhostbox.com
Outgoing Email:
- SMTP Server: us3.smtp.mailhostbox.com
Calendar and Contacts:
- CalDAV/CardDAV Server: us3.dav.mailhostbox.com
- Calendar Server Path: /principals/users/[USERNAME]/ (replace [USERNAME] with your email username, that is the part of your email before the @)