This article applies to 123-reg VPS hosting running Plesk 10
This article will explain how to create an E-mail Aliases in Plesk.
You can use e-mail aliases as temporary disposable addresses which you can publish on the Internet. When you start to get spam coming to an address that was set up as an e-mail alias you simply remove that alias and create a new one. Click on an e-mail address. Select the E-mail Aliases tab and type the alias name.
Then to create a second alias click on the Add E-mail Alias link and click OK. For example any mail sent to email@example.com will automatically be forwarded to firstname.lastname@example.org.