Making an email alias means creating an email address that shares the same mailbox with a different address for both the inbound and the outgoing email messages. For instance, you’re able to make an e-mail address email@example.com and it will be associated with a unique mailbox. Then, you can make an alias firstname.lastname@example.org, which can make use of the mailbox of sales@ and will not have a mailbox of its own. When you look at your e-mails, you'll see messages sent to either one of the two email addresses in one location, which might be far more convenient in some cases as you will not need to log in and out of various email addresses using webmail or set up various email addresses in an email program. This option is frequently used as a replacement for forwarding e-mails from a single e-mail address to another one if multiple addresses are listed for contact on a site.