To create an email address, perform the following steps:
1 - Logged in to Plesk, https://your domain name:8443 .
2 - Go to Mail.
3 - Open Email Addresses tab.
4 - Click Create Email Address.
5 - Type the left part of the email address before the @ sign, and, if you have several domain names on your account, select the domain name under which the email address will be created.
6 - Specify a password or use Generate password.
7 - Specify the mailbox size or use the default size defined by the provider's policy or your service plan.
8 - Click OK.