Step 1: Login to the Plesk control panel with your login credentials.
Step 2: Click the Websites and Domains section.
Step 3: In that, select ‘Add New Domain Alias’.
Step 4: Provide the name for the domain alias in the ‘Domain alias name’ section, and then select the domain for which you are going to create an alias in the ‘for the domain’ section.
Step 5: For setting the email alias for the main domain, enable the ‘Mail service’ option in the settings.
Step 6: Setup the redirection for the website in the main domain. enable the ‘Web service’ option and then enable the ‘Redirect with the HTTP 301 code’.
Step 7: Click OK to save the changes. Hereafter, you can access your website with your alias name.