Making an email alias means creating an e-mail address which shares the exact same mailbox with a totally different e-mail address for both the incoming and the outgoing e-mail messages. For instance, you’re able to create an e-mail address email@example.com and it will be linked to its own mailbox. Then, you can create an alias firstname.lastname@example.org, which will use the mailbox of sales@ and will not use a mailbox of its own. Once you check your e-mails, you'll see email messages sent to both of the two addresses in one place, which might be more convenient in some circumstances as you will not need to sign in and out of various mailboxes using webmail or create multiple email addresses inside an email application. This feature is commonly used as an alternative choice to forwarding e-mail messages from one e-mail address to a different one if numerous email addresses are listed for contact on a site.