Creating an email alias means setting up an email address that shares the same mailbox as a completely different address for both the inbound as well as the outgoing e-mails. For example, you can make an email address email@example.com and it will be associated with a unique mailbox. Then, you can create an alias firstname.lastname@example.org, that can use the mailbox of sales@ and will not have a mailbox of its own. Every time you look at your email messages, you'll see messages sent to both of the two addresses in one place, which might be far more convenient in some instances since you will not have to log in and out of various mailboxes working with webmail or set up various email addresses in an email application. This feature is frequently used as an alternative choice to forwarding messages from one e-mail address to a new one if numerous addresses are listed for contact on a website.