Creating a new email account in webmail.
Step 1. 
Login to your webmail account.  

Step 2
 Click on the highlighted dropbox menu.

Step 3
 Select User Administration option from the dropbox menu.

Step 4
 Click on add button which is highlighted to create a new user. 

Step 5
After filling new user info click on save.

Step 6
 Your new user is now added successfully.