E-mail aliases can be used as temporary disposable addresses that
can be published on the Internet. When spam starts coming to an address
that was set up as an e-mail alias, you can remove that alias and
create another one.
1. Go to Mail.
2. Click an e-mail address.
3. Select the E-mail Aliases tab.
4. Type the alias name.
To create a second alias, click the link here.
5. Click Ok.
Now any mail sent to firstname.lastname@example.org will be automatically forwarded to email@example.com.
That's it! Now you know how to create e-mail aliases in Plesk.