If you wish to setup an email account on a device, follow the below instructions:
https://docs.plesk.com/en-US/12.5/customer-guide/quick-start-with-plesk/set-up-mail-accounts/2-access-your-mailbox.65691/
The instructions above include details for setting up mail on:
- WebMail
- Outlook
- Windows Live Mail
- Thunderbird
- Apple Mail
- iPhone or iPad
- Android