Making an email alias means setting up an e-mail address which shares the same mailbox with a different e-mail address for both the incoming as well as the outgoing emails. For instance, you’re able to make an email address email@example.com and it will be linked to its very own mailbox. Next, you can make an alias firstname.lastname@example.org, that will make use of the mailbox of sales@ and won't use a mailbox of its own. Every time you check your emails, you will notice messages sent to both of the two addresses in one place, which can be far more convenient in some circumstances since you will not have to log in and out of numerous mailboxes working with webmail or set up multiple addresses inside an email application. This feature can be used as a substitute for forwarding e-mails from one e-mail address to a different one if multiple email addresses are included for contact on a site.