Creating an email alias means making an email address that shares the very same mailbox with a completely different e-mail address for both the incoming as well as the outgoing messages. For example, you can make an email address email@example.com and it will be connected to its own mailbox. Then, you can create an alias firstname.lastname@example.org, which can make use of the mailbox of sales@ and will not use a mailbox of its own. Every time you look at your e-mails, you will notice emails sent to either one of the two addresses in one place, which may be far more convenient in some circumstances as you will not need to sign in and out of different email addresses working with webmail or set up multiple addresses inside an email program. This option is often used as an alternative choice to forwarding email messages from one e-mail address to another one if numerous addresses are listed for contact on a web site.