What is A USER, can i create multiple e-mail id from one user ?

What is A USER, can i create multiple e-mail id from one user ?

What is a user in Zoho mails Editions ?

Suppose i have domain name xyz.com and i have required 3 e-mails accounts as :

support@xyz.com   : used by support team

feedback@xyz.com  : used by Feedback team

manager@xyz.com   :  Will responsible for sending special mails to Employees ( to Gmail and others) regarding meetings.

all of these are 3 accounts  will accessible by 3 different persons through their credentials. 

In standard edition can i create these E-mail accounts with different logins ?