Creating an email alias means setting up an e-mail that shares the same mailbox as a totally different address both for the incoming as well as the outbound email messages. For example, you can make an e-mail address [email protected] and it'll be associated with a unique mailbox. Then, you can create an alias [email protected], that can make use of the mailbox of [email protected] and will not use a mailbox of its own. Every time you look at your e-mails, you will notice email messages sent to either one of the two email addresses in one location, which may be more convenient in some circumstances since you will not have to sign in and out of various email addresses working with webmail or set up many email addresses in an email application. This option is commonly used as an alternative choice to forwarding email messages from a single address to a different one if a number of email addresses are listed for contact on a website.