Making an email alias means setting up an email address that shares the same mailbox as a totally different e-mail address for both the incoming and the outbound e-mails. For example, you are able to create an address email@example.com and it will be associated with its very own mailbox. Next, you can create an alias firstname.lastname@example.org, which will make use of the mailbox of sales@ and won't use a mailbox of its own. When you check your emails, you'll see emails sent to either one of the two email addresses in one location, which might be more convenient in some circumstances as you will not need to log in and out of numerous email addresses using webmail or create various email addresses inside an email program. This feature is commonly used as a replacement for forwarding e-mails from one address to a new one if multiple email addresses are included for contact on a site.