Steps to follow to add an Email account in plesk

1. Login to Plesk Panel using current username and password.
2. Go to the domain name and click Mail tab.

3. Click on Create E-mail Address.

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

5. 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. 

1. https://kb.diadem.in/creating-pop3-e-mail-account-in-outlook-2010_312.html
2. https://kb.diadem.in/roundcube-webmail-guide_658.html