An email alias is an email which uses the very same mailbox along with the initial e-mail address. For instance, you could have email@example.com as the original e-mail address and create an alias firstname.lastname@example.org. Both the addresses will be able to share the exact same mailbox, so emails sent to either one of them will be received in a single place. You can use aliases for several needs, for example communicating with various types of people or enrolling on websites. For those who begin to get a lot of spam, for example, you can easily remove the alias whilst your original mailbox will not be changed at all and you will retain the e-mails you need. Aliases in many cases are considered to be a substitute for forwarding messages from one mailbox to a different one if you use 2 or more addresses for contact on your website.