Create an email id in Plesk control panel
Steps to follow to add an Email account in plesk
- Login to Plesk Panel using current username and password.
- Go to the domain name and click Mail tab.

- Click on Create E-mail Address.

- In the next screen,specify new mailbox information,enter name of new mailbox.
- Select the domain name,you can use auto generated password by clicking Generate password button.
- Specify the mailbox size then click OK.

- Once new mailbox is created,you could see it in the list of all email accounts.

Steps to follow the link and setup email client in outlook and web mail access.
- https://kb.diadem.in/creating-pop3-e-mail-account-in-outlook-2010_312.html
- https://kb.diadem.in/roundcube-webmail-guide_658.html